Radiator is full and it is not overheating and I cannot quite figure it out. May 26, 2018 · Try looking at the Schrader valve in the fitting. No noise is good noise, but at least with a loud kick, slap, or knocking noise, it’s usually a cheaper fix. A hissing sound in a car is, in most cases, associated with leaks. I did vtec couple times taking it close to 8300, but this might not be the issue. When this happens, it can create a hissing sound, similar to air escaping from a hole. May 16, 2022 · Car chugging- also known as juddering or stuttering- describes the spluttering sound and motion that your car can make as it loses power. It seems to be coming from the right side of the engine near the firewall. If the hissing is coming from there, quickly and lightly press on the valve to help it seat. Apparently it’s a pretty common failure and the dealership did the replacement under warranty. My car drives fine. Leaking Exhaust System. Jun 5, 2007 · when im driving at a normal speed lets say 40 mph on 5th gear. Jul 23, 2023 · A hissing noise from a car when braking but stopping once it has stopped is often caused by the brake booster. Find out what your vehicle is trying to tell you, so you can make minor repairs along the way. Hissing or sizzling, on the other hand, can indicate a leak. Jan 11, 2024 · If you hear this sound coming from under your vehicle’s hood, then a faulty belt may be to blame. It has to be something I did :whistling because the sound was not there before I completed the work. May 3, 2022 · Internal valve leaks are common and easily fixed. . Two days later on my way to Jul 4, 2023 · Hissing AC System: One of the common causes of a hissing sound is a problem with your car's AC system. Once this sound occurs, you know that the brakes are down to the metal. Then use a leak dye light (black light) and check to see where a leak is and fix as required. Be careful investigating under the bonnet in case you get burnt, and book your vehicle into the garage . Small cracks or holes can be repaired using Firegum paste Nov 11, 2021 · The car’s engine speed will fluctuate up and down as the engine computer struggles to find the right mix of fuel and oxygen. Q: What should I do if my car is making a noise that I should never ignore? A: If your car is making a noise that you should never ignore, it is important to have it checked by a Jun 6, 2010 · After driving today I turn the car off and I'm hearing this hissing noise in the engine bay. The coolant system might release excess pressure as the engine cools down, leading to this hissing sound. The harder I accelerate, the louder the noise. Sep 19, 2018 · Cars make all kinds of sounds and most of them are completely normal signs of a well-tuned machine. Aug 14, 2024 · 1. I can bring the sound back under acceleration at higher speeds. Nov 5, 2023 · If you hear a hissing noise from under the dashboard that changes when you press or release the brake pedal area, it most likely is a brake booster that is failing. FixMyCar looks at some of the reasons why your car might be making a hissing noise. rear right side. If you hear the area where the leak is but can’t find it, consider using some soap and water in a spray bottle. Feb 14, 2018 · 16 Onyx Black Corvette Z06 3LZ - Magnuson 2300, Katech Heads, 5" Halltech, Katech 112, Cam Motion Cam, 2" Kooks w/ green cats, Borla S Type, Afco HX, Fuelab Brushless Custom Low Side, XDI +65% Injectors. Oct 26, 2023 · A sizzling or hissing noise coming from under the hood after you turn off the engine is usually an indication of a leak. Why Your Battery is Hissing. Dec 19, 2022 · Due to the high temperatures, the gasket can become worn out or cracked, causing gas to leak out. Initially, the valve located near there (engine bay area near the firewall) was clogged up or spoilt. Hissing sound coming from under car on acceleration - stops around 2000 RPM and power comes on quick at that point. There are no fuel leaks or cracks in the hoses. My car Feb 28, 2010 · Heading to an appointment I started going up a hill when I started to hear a very noticeable hissing sound from under the hood. But hissing sounds can be problematic when they're continuous and usually signal one of these three issues: Refrigerant leaks ; Interval valve leak; Compressor problems Dec 20, 2005 · Has anyone noticed hissing noise coming from somewhere underneath the car when you unlock the doors or open the door after the car is parked for a few hours? It's a high pitch hiss for about 2 - 3 seconds that sounds to me like something is being pressurized (or depressurized). The mechanic will need to crank the car in order to verify the hissing sound, and a test drive may be necessary to duplicate the complaint. Over time, certain parts such as hoses or gaskets may deteriorate and develop leaks that produce this distinct sound upon engine shutdown. Whether you hear grinding from the engine or other car components, it’s a serious sound that shouldn’t be taken lightly. But there can be other causes as well. It sounds exactly like when we let loose the air from the tire's valve. While there are many noises your car can make indicating something isn't right, hissing is one of the easiest to diagnose. under the rear passanger door? Mar 29, 2006 · This deep hissing sound (almost like air leaking) I am hearing is more noticeable when I first start the car up in cooler weather and it seems to be under load when in gear. As soon as I get in the passenger seat, (car off) I can hear a distinct hissing sound coming from under the center part of the dashright behind the center vents perhaps. The leak definitely sounds like the water pump. If it does it may be overheating. If the hissing happens when you accelerate, it could instead be a vacuum leak from one of the small hoses around the engine’s air intake. 00 Amazon gift card by referring a friend! Apr 3, 2011 · There has been a hissing noise (almost sounds like a vacume leak). But if your noise is quite loud, you likely have an issue that needs investigating by a Dec 13, 2016 · Hissing, gurgling, or sizzling. Reason 10: Evaporative Emission Control System (EVAP) System. Customer: High pitched hissing, whistle, or sucking sound coming from under car. I'm 90% sure. The two major ones are faulty brake booster and master cylinder. Chances are you will see a black, red or fluorescent green liquid pooling on the driveway or the garage floor. I feel it's more pronounced on the driver's side where exhaust runs than the passenger side. A clicking noise after you turn the engine off is not uncommon – in most cases it's just the sound of the engine cooling down and this is nothing to worry about. It would go away) and also the ac is not working. It sounds like it's coming from under the hood and I can only hear it with my windows opened. 6. May 2, 2018 · A hissing sound is something you rarely want to hear coming from your vehicle's engine. Apr 25, 2007 · This morning when checking the tire pressure while the motor is running, I noticed the sound of air hissing from under the car near the rear wheel passenger side. The noise is similar to air being released, or as if the water is running in the next room. This sound typically indicates an issue within the vacuum brake booster, which provides the power assist that gives you power brakes. Regardless, if you hear a hissing noise under the hood, get out of your car and look underneath it. Tires are good and not loosing air. It could also mean that extra air is seeping through a window because of a defective seal. Apr 1, 2020 · Not only can you hear it, but you can also feel it. You will need to have refrigerant and dye added to the system and the hissing will go away. 4 Apr 26, 2010 · so i hear it every time i start my car. Poor Engine Mounts. If your car gets loud when accelerating and produces a hissing sound from the engine, you might have a Nov 5, 2023 · Sometimes, you may hear a noise from under the dashboard. If a malfunctioning AC compressor is the cause of the hissing noise, it could need to be replaced. However, caution should be exercised when attempting Dec 4, 2006 · Anyways, just a couple of days ago I noticed a constant hissing noise coming from under my car. It seems to be coming from the middle of the car, not the engine. Seems to be coming out near the valve cover gasket. Took it to the shop and they told me that the sound is coming from the fuel pump. Jan 7, 2018 · A hissing noise is another common sound drivers hear from their car’s air conditioner. After that I have had a hissing sound that is directly tied to the acceleration of the car. rear wheel (it's not coming from the tire, it's only audible when the car is running). You can't figure out what it means, and you think that your car is about to explode. A vacuum leak occurs when air enters the engine from an Aug 1, 2023 · A hissing noise coming from a car radiator when it is turned off can indicate a potential issue that requires attention. The gurgling sound is typically associated with boiling water and a sizzling sound, similar to that of hot bacon being fried on a griddle. Though a noise accompanies the shuddery movement, it’s the sudden motion that makes a chugging vehicle unmistakable. Never thought it was something to worry about. Jul 19, 2023 · You hear a hissing noise coming from your car. In other words, if I was accelerating and the RPMS went up, (and the hissing slowed or stopped), I would get reasonably cold air. I am due to pick up the car in a bit. Never your car. Thought it was an exhaust leak on my motordyne. Possible Causes of Whistling Sound When Car is Idling Vacuum Leak. Now, when this system has a leak, be it in the radiator, hoses, or water pump, it can lead to the coolant escaping under high pressure. If I were to describe the noise, it sounds like air leaking out of a flat tire. When it comes to buzzing from under the car, you’re most likely hearing your EVAP system doing its thing. Luckily, this sound is pretty much harmless. Aug 16, 2018 · Right front seat leaks pressure So I can hear hissing sound from the passenger front seat. I first though it was a exhaust leak but they confirmed the noise and pinpointed the noise to the fuel pump. Anybody know if this is normal? 2014 q60s 24k I have a hissing sound and smoke/steam coming from under my hood. Now I can hear a hissing sound coming from UNDER the car by the front of the exhaust in front of the mesh. This issue is more prevalent in older cars. Dec 12, 2023 · When you’re driving your car and notice a strange hissing sound coming from under the bonnet as you accelerate, it can be concerning. Aug 30, 2021 · This noise is likely caused by a loose part moving around slightly under the hood. Brake Booster Boot. As much as this sounds weird, it is essential to understand what causes this noise, how to identify them, and if it should worry you. Do you notice a hissing noise coming from near the front of the vehicle (rear of engine) when leaving the car to idle? If so, there could be a crack in the exhaust manifold. Other symptoms: Frays or cracks in the belt, poor engine performance, or overheating; The fix: Look under the hood and visually inspect the belts on your engine. Troubleshooting your vehicle’s hissing noises is a tough task. Heres the issue: the engine makes a 'whoooooshing' sound when accelerating slightly hard, normal acceleration is fine - it sounds like a burst of wind no Mar 2, 2016 · Hissing Noise when Idling. If it's still usable, then you should tighten the belt and you see if the hissing sound Jun 26, 2017 · 2006 Jetta MK5 BRM with 210K. What’s that hissing sound? The problem: Hissing sounds can happen for a variety of reasons, and some can be spookier than others. My problem with it is that there is a hissing noise coming from under the hood when the car is running. Feb 11, 2021 · My daughter noticed a slight sound as she walked by it to get something; it was coming from under the car, just in front of the right rear wheel, about 2 foot in from side. This could be due to a refrigerant leak or a malfunctioning component within the system. That happens when the refrigerant moves from the high-pressure side to the low-pressure side of the compressor. Mar 21, 2024 · Of course, the most notorious grinding sound occurs with the brakes when the pads are worn down. The hissing from the A/C is normal after the engine is shut off, the high- and low-pressure areas of the system are equalizing so you will often hear hissing coming from the evap coil, dryer, or expansion valve areas. Because of it, diagnosing it may be challenging, so be sure to finish reading this article. If you hear the AC hissing after you turn your car off, that’s actually just your car’s way of equalizing pressure. A minor leak could produce a hissing sound when you press or release the brakes. Once you’re out of the car, you may also see steam coming from under your hood. It could be due to leaks in various components such as a cooling system, an exhaust system, a faulty hose, or even due to engine overheating. This sound seems loud and active up to around 2000 rpm then drops off as power really picks up. Spray down the area where you think the leak is and watch for small bubbles. Check under the hood for the black sticker that shows refrigerant specs. Not a lot of smoking or sputtering from the engine. If your engine sounds like a snake upon starting, there are probably gasses or compressed air coming out through a tight spot somewhere. Alternatively, the hissing sound could just mean that the engine is overheating. 5. If you hear this sound when you turn the vehicle off, it’s due to pressure equalization. As soon as the engine of your car is shut off, a sizzling or hissing sound will be emitted from under the hood. Get your car to a local service shop right away. What Should You Do About a Hissing Noise? If it seems that the hissing noise is connected to braking, don’t ignore it and hope the sound just Q: I've recently got this car and I just noticed a quiet hissing noise whenever I accelerate. it sounds like some air is escaping under pressure. when i let go of my pedal my car makes a hissing noise like "chhhh" or air leaking in the engine bay area. 129-30 under JeM 2006 Nov 30, 2023 · Take the car for a professional inspection and get the damaged part replaced to avoid unpleasant situations. I left the office to chance going home and after a few miles the hissing stopped. The issue can be resolved once the source of the hissing sound car AC has been identified. It also seems to be loudest when the engine is hot. If you hear hissing outside the vehicle, air could escape a punctured tire. The sound may vary in intensity, but it’s important not to ignore it. I tried to pinpoint where it is coming from and it seems to be originating from the gas tank area. This noise is usually indicative of a fluid leak in the engine bay and can be identified by performing a quick visual inspection. Cooling system leak. Hissing or Sizzling Noise When The Car Is Off. On our way to the house this evening, I turned on the ac and I noticed that the hissing noise never went away like it had done in the past ( in the past it would only hoss maybe 5 seconds the. Nov 29, 2011 · I've some some checking and the hissing sound definitely comes on when the A/C is activated at low vehicle speeds. Any ideas as to what It might Be? I have Rac Warranty for 3 years and I don't know if that's classed as wear & tear or not. When the fans turn on the hissing sound goes away momentarily and comes back. Thanks Sent from my SM-G973W using Tapatalk Mar 20, 2008 · Hey everyone, just wondering if you might know what this is: After go out for a drive and I put my car in park, I can hear a distinct hissing noise coming from under the body, near the rear passenger area. Hissing sound coming from the rear passenger side of the vehicle. Hissing under the hood. If I increase the idle the sound is much less, bring it back to idle and its louder. Nov 7, 2021 · Sure, there might be a bundle of rattle snakes living under the hood but if your car or truck’s engine makes a hissing sound it could also be an indication of a leak, either in the cooling Oct 27, 2023 · This is the sound of the gases leaking out. Since the AC system is sealed and always under pressure, the hissing sound does not necessarily indicate a problem. One possible A vacuum leak happens when some part of the engine’s intake system is compromised so that it leaks, but a vacuum leak doesn’t always make whistling noise. Let’s get into exactly what is happening when your car battery is hissing, what causes it, and what you should do about it. What's the cause of this sound? Jun 27, 2009 · I looked again and played with the gas cap and everything looks to be sung and tight - but the noise is still there. The hissing noise is due to the A/C evaporator being starved of enough refrigerant. My fluid was at a normal level, the sound only occurs when the car is moving. its not the normal turbo sound, there's no dump valve only the stock waste gate. I’ll explain a bit more about what the brake booster does and what makes it cause a hissing sound when pressing the brake pedal. 3. This is a common issue especially on older vehicles when debris gets caught in the valve. Engine overheating. A bit of crawling led me to the fuel tank, where I heard was sounded like a distinct hissing noise coming from inside the tank. Aug 30, 2020 · So I bought a used 2017 Jeep Grand Cherokee Limited. You may be able to find the leak simply by listening for a high-pitched hissing sound where the air is escaping. Probable Cause: Failed outer CV joint If your car is making a clicking noise when turning, it is likely you have an outer CV joint (constant velocity joint) that has failed because of a torn boot or old age, most likely a torn boot. The fuel pump needs to be submerged in gas to cool itself. Only developed this summer. The sound appears to be in the dash, near the defrost vents about center slightly to the passenger side. Good afternoon friends! My partner was driving and the car lost power and wouldn't accelerate. We have done research to find out if the hissing is a real problem and have answers to share. My car has 232000 miles. Additionally, the mechanic will inspect the brake pedal operation, the condition of the brake booster, the master cylinder, the level of fluid in your system and more. After the dash was removed, they changed the evaporator. I found that odd, so this afternoon with outside temps around 65F I decided to set the automatic system to "low" and hit the A/C button to try and get the air to go. Jun 1, 2007 · I charged the system (car running, A/C on MAX) to about 43psiblowing super cold. You might be able to determine the source of the leak with a quick visual inspection, but be careful! The only problem is this hissing sound. Aug 30, 2023 · A TCM emitting a whistling noise when unlocking the car: Power Steering System : : A worn belt causing a squeal when turning the steering wheel: Hoses: : : A hissing noise from a small leak in a hose: Brake Pads: : : High-pitched noise from worn brake pads and rotor contact: Radiator/Cooling System: : : Hissing noise with steam from a cracked Oct 1, 2007 · Hey guys just a weird question, I just installed a walbro 190 fuel pump about a week ago and everything was fine (noise wise besides your normal wine) but now all the sudden (today) I noticed a hissing sound near the fuel tank under the car. Compare that to the amount added from Apr 29, 2022 · How to Fix a Car AC Hissing or Heater Rattling Noise. Low rumbles from the tailpipe, a soft rhythmic hum from the engine compartment, even a slight thunk sound when you first turn on your air conditioner--these are all good news. In my case the "hissing" coincided with a lack of cold air blowing. There's no check engine light. Hissing may also be produced by certain engine parts that are deteriorating. Ensure that the timing belt is installed correctly and not worn out. It sounds like air rushing out, not the standard sucking sound I would expect from a vacuum leak. The sound is not very loud but non stop and could be heard every second or so when the motor is running. Bad or Clogged Muffler. You can also get the pulleys tensioned, especially if your car is old or in constant use. I would say that source of leaking is almost in the middle of the seat bench (vertical area) ca 15 cm from the horizontal seat area. If the problem is due to a simple fix like a dirty air filter or a loose hose, the cost could be relatively low, ranging from $50 to $200. There’s a link between most of these flaws, and we’ll see how. You will normally hear the noise only when the engine is running, and you press or depress the Oct 18, 2021 · 7. Any similar issues??? Recently installed K&N air filter in stock airbox. Mar 6, 2023 · This is most noticeable when you are about to refuel your car, and you hear a lot of air going out or into the fuel tank when you open the fuel tank cap, which creates a hissing noise. Dec 1, 2022 · Identify the Location of the Hissing Sound. the sound is loudest in front of the pass. If the noise is "clacking" and the car is running, it is typical when the break pads or shoes are worn, there is dirty in the calipers or drum preventing the system to be relocated correctly to the right position for its elements (pads, springs, pins, etc), the break pistons are applying force to the pads/shoes but then leaving too much gap between them when released. A check revealed that only 50+% of the refridgerant was left. The booster diaphragm, the vacuum hose, or the master cylinder could all be leaking. The sound goes away after a few minutes as the piston smooths itself out and finds a cleaner groove. Jul 20, 2018 · Got confirmation that the Hissing sound or breathing sound comes from the evaporator that is under the dash and after inserting colorant in refrigerant they confirmed the leak was coming from evaporator. At cool temperatures, it is not as noticeable. One common cause of a hissing sound in a car is air escaping from the engine or a leak in the vehicle’s air intake system. The leaking pressure will make a hissing sound. Seemed fine. Nov 6, 2022 · It was the evaporator. I noticed a sort of hissing noise, like escaping air, on the passenger side, coming from underneath the car. 2020 WK2 Trailhawk 24,000k Aug 12, 2014 · I get that same noise all the time. The first step in diagnosing an engine hissing sound is to pinpoint the exact location of the sound. If you hear a hissing noise when the car is running, there is a good chance the brake booster boot or seal is cracked. A high-pitched squeak or a hissing noise can reveal that there’s a problem with the hoses around the engine, Burkhauser says. Hissing sound in a car: know the causes . Car Air Conditioning Hissing When Off. Hissing Bad Car AC Sound. This guide covers all the possible causes (and solutions) to help you understand what could be wrong with your vehicle. is this normal because it gets annoying. The noise lasts only for several seconds in intervals, which can last up to a couple of minutes. Aug 10, 2023 · The hissing sound from your engine usually occurs due to cracked hoses, a defective pressure cap, vacuum leaks, or a leakage in the cooling system. If the foam is missing or damaged, you may hear the hissing sound. Air leaks can create a hissing sound, which is usually more noticeable when the engine runs. The hissing sound is particularly noticeable when the engine is revving, and it can become louder as the leak worsens. We focus on safety and maintenance issues with regard to your home, auto, apartment, motorcycle, boat, small business, finances and more. Worn muffler: A damaged or worn-out muffler can produce a rumbling or growling noise. Drove again later, but didn't have the same hissing sound. Jul 27, 2020 · 5. I can make the sound come back at higher speeds if I press the accelerator pedal aggressively. 7 4x4 has recently started making a strange hissing noise. under the car . Now that we know the basics of idling, let’s look at some possible causes of the whistling sound when the car is idling. Hissing A hissing sound from under the bonnet suggests there is a fluid leak, which is getting onto a hot part of the engine, such as radiator coolant leaking onto the engine block or exhaust manifold. This article has provided sufficient information on the causes of car AC making a hissing sound. If you also see a little puddle of liquid accumulated under the car after the AC has been running, it's usually just drops of condensation, again, nothing to worry about. By identifying the specific location, you can Oct 3, 2010 · While accelerating there is a distinct hissing sound coming from near the firewall that seems to go away once the car shifts into 4th gear. This is often due to turbo lag, which is just a fancy way of saying the turbo takes its sweet time to get going. This is normal and nothing to worry about. Clicking Noise While Turning. one photo/Shutterstock. (increased gas mileage Jul 24, 2023 · It is good to know why your car might be making a hissing sound and what it might mean for your vehicle’s health. Either way, a hissing noise while starting the engine is never a good sign. Most of the time, a whistling or hissing noise coming from the AC system is not a sign of a system problem. Jun 26, 2023 · Here are the most common reasons your car might be making this noise: 1. Sometimes, the ‘air escaping’ sound is just a part of your car doing its job. The good news is this doesn’t always spell trouble. My car is making a hissing noise. Only snakes or an angry cat should make hissing sounds. Sep 12, 2016 · Recently, the van started making unusual hissing noises. After you turn off the AC, you may hear a hissing sound as high-pressure and low-pressure areas equalize in the system. Nov 7, 2023 · Buzzing From Under The Car. Damaged hose or vacuum. May 29, 2009 · Hi guys, Yesterday i noticed a very strange noise coming from under the bonnet whilst driving. When pressing on the gas pedal when stationary or accelerating and you hear a loud hissing noise coming from the engine bay, it is most likely a leaking exhaust Feb 1, 2023 · Hissing Noise Under the Hood If you hear a sizzling or hissing sound coming from your car after the engine is shut off, then chances are something in the engine bay is leaking. Diagnostic. It might just make a hissing sound and the engine may either run rough or at an abnormally high idle speed. Sometimes it also makes noise when you turn it off. One of the most common causes of a whistling sound, when a car is idling is a vacuum leak. My car is making a noise when the engine is off. Jan 7, 2011 · Hey all, I'm just curious as to where this noise is coming from. (It was large vessel, I did not check if it was the CC or muffler). Nov 23, 2021 · A: To diagnose the problem when your car is making a noise, it is best to take it to a mechanic who can inspect the vehicle and identify the source of the noise. If you hear this sound coming from under the hood when the car is switched off, oil or coolant is likely leaking onto a hot engine component. My AC Makes a Whistling or Hissing Noise. The Four Common Causes of a Hissing Sound Coming from Your Car. Sound came from front passenger footwell area. A missing or damaged foam silencer. This can be done by carefully listening to the engine while it is running, paying close attention to the areas where the hissing sound is most pronounced. Nov 14, 2022 · How Much Does it Cost to Fix Hissing Sound in Car AC. She crawled under and it seemed to be coming from the area of (maybe) the catalytic convertor. Feb 6, 2008 · My car was idling this evening and I could hear this "hissing" noise coming from under the car (I think). Mar 22, 2015 · A hissing sound when applying the brakes in a car can be concerning for any driver. However, when I was replacing the vaccuum hoses, my hose that comes off of my overhead cam came unconnected from the piece of hosing coming from the engine. If you have a hissing sound on your car AC, first diagnose the AC systems and follow the above instructions to fix it. Then, be sure to leave the AC unit off until you have the right specialist look at the issue. If you’ve turned on the air conditioning (AC) or the heater in your car and you hear a rattling, hissing, humming, or similar loud noise from under the dash, follow these steps to diagnose it. Aug 18, 2010 · This noise is normally associated with your drive belt. Aug 1, 2021 · 3. It quieted Mar 30, 2007 · After replacing a broken left exhaust manifold stud and cleaning the throttle body I found that there was a hissing sound (like a pod filter but a bit quieter) under light to medium throttle, but it goes away under heavy or fully open throttle. There was no visible issue under the hood that I could find. AC was functioning properly and no visible signs of leak. Depending on the severity, a cracked manifold could make the vehicle un-drivable. Dec 18, 2023 · Loose heat shield: The heat shield that covers the exhaust system can sometimes become loose, causing a rattling noise when the car is in motion. Sometimes when you turn the car off, there is a hissing sound. It has also provided a simplified guide on how to fix the hissing sound of car AC. I can't trully say the car doesn't do it when cold, but it's more noticeable when warmed up. See the picture below the hissing is coming from under the top radiator hose and the steam/smoke (hard to tell). Jul 17, 2021 · In some GM cars, a PCV valve has a rubber diagram inside that is very common to fail. Don't investigate a leak yourself as you could hurt yourself. The "hissing" is definitly coming from under the Jeep though - definitly in the direct area of the gas tank. It's a whooshing/hiss that wasn't there before. Description of this sound: Essentially, the hissing sound is the sound of vapor or steam escaping a pressurized source. That’s your car’s way of crying for help. After it rained allll day yesterday (my car was parked all day), and then I noticed a hissing sound coming from under the hood. 2L, 85K miles I was changing out the spark plugs and wires tonight, and did a test startup to make sure everything was good. But something that sounds like a passel of snakes writhing under the hood often leads to a diagnosis of ill health. Symptoms Air Noise from the brake pedal The presence of a hissing noise when shutting down your car could signify potential damage within certain components under the hood. Removing an intake manifold is a labor-intensive job. Oct 10, 2021 · The brake booster is usually the source of a hissing sound. The hissing sound from the car AC when the car is off is the car equalizing pressure. Jun 24, 2015 · I noticed a hissing sound coming out from under the car. Hissing Sound from Under the Car Hood. Many vehicles that have brake boosters come with a piece of foam that blocks the hissing sound. Sep 23, 2010 · I have started to notice a hissing noise coming from under the hood of my car after turning it off. Is this a hissing sound like "Sssssss sss ssss sssss sss" or it's a sharp screeching sound? When was the last time you changed your belt? Do a visual inspection and see if it's cracking. It's important to be careful when inspecting the source of the leak as some fluids and air around the engine could be dangerously hot or harmful to come into contact with. To repair the problem, failed parts must be replaced. Jun 21, 2023 · How to Eliminate Hissing from the Car AC. The compressor was not on, nothing was on inside the car, but it sounded like it was cutting on and off. A quiet purr or a muscly growl, fine. Other Possible Reasons For A Hissing Noise Under Dash. Do you think it may be low on freon? Could it be something else? Any help would be appreciated. This noise is usually considered normal, but sometimes Read more10 Reasons Why Your Car Makes Noise When You Turn It Off Feb 22, 2023 · Listen for the leak. Aug 16, 2017 · It did NOT make this noise for the first 3+ years of ownership. Jun 13, 2006 · My '03 Liberty 3. Jul 21, 2009 · Once again, '96 S-10 2. I am hoping that this sound is no big deal. Could this noise be a result of using the air conditioning? Does anyone else have a hissing noise emitting from their Focus after turning it off? I have a 2005 Ford Focus ZX4 ST. Also I'm not throwing any CEL either Mar 22, 2015 · A hissing sound when applying the brakes in a car can be concerning for any driver. It is on the passenger side. Sound seems to come more from under the car than the engine compartment and my car Jul 23, 2023 · A hissing sound from an AC isn't always a troubling sound for car owners. Knocking Noise While Driving Apr 16, 2024 · You might also notice your car feels a bit sluggish, especially at lower speeds. Apr 11, 2016 · I had this checked by technician. And let’s not forget the strange whistling noise you might hear coming from under the hood. Low coolant is the most likely reason, but there are other possible explanations. Receive a $5. After I stopped and got down from the car, I heard a hissing sound from below the car, like my tire pressure was decreasing or water turning into steam. A visual investigation may help you find the leak’s origin but tread carefully. It happens only when accelerating slightly hard. When there is a leak, the refrigerant may escape and create a hissing sound as it passes through the damaged area. Sep 1, 2008 · I visited my regular mech when my 3+ yr old car started to give a faint hissing sound only when I turn on the A/C. Jun 7, 2022 · In the same way, you should turn your AC off when you hear any hissing or whistling sound. In addition to the reasons above, there are other potential causes of such hissing noise. Jul 3, 2014 · Hey guys, I know this tread is a few years old now, but I can hear a hissing noise under my 2016 Titanium Focus. The evaporator was leaking it is under the dash so it can’t be seen easily. I just got done replacing my vaccuum hoses, so I know it is not them. When you accelerate, the car will lack power and respond slowly to pressing down on the acceleration petal. If the hissing sound happens when the HVAC system is running Sep 10, 2019 · Hissing. The A/C works good and is cooling. Our pages are filled with helpful tips and information about the topics that most of us face in our everyday lives. 4. When the A/c is running I can hear a hissing noise on the inside of the vehicle. Exhaust leak (from the rear of the car) A leak in the cooling system. You can check your temperature gauge to confirm this but you should also pull over safely and call for assistance. When accelerating, you can easily detect a rumbling noise from under the engine, and the strange sound amplifies at high speeds. The vacuum lines that connect with the brake booster can become cracked or damaged over time, which causes air to leak out through the line and create a hissing sound as you apply your brakes. It's more audible closer to the rear of the car as if air is escaping through a hole. If your car’s air conditioner is making a hissing noise, it’s more common than you think. Mar 23, 2024 · Piston Slap A piston slap occurs when an individual piston inside your engine isn’t perfectly aligned and tightly secured inside the cylinder it fires into. Checked coolant levels, and other the car, couldn't find anything that would look like leaking. A Hissing Sound. Mar 7, 2016 · OK so the weather has started moderating (60s) and now I started hearing a hissing noise in the dash when I am assuming the system is calling for air conditioning. I also noticed when I shut off my car, it takes a few seconds for the hissing noice to go away. In order for the AC compressor to be the cause, its internal gears need to break and shatter enough for the small piece to travel through the AC pipes and clog the expansion valve. Here is a concise summary of all the potential causes, however. Samantha Morici, DVM, Head of Veterinary Services at Koala Health, explains. its a hissing sound. It was, so I turned it off and a few seconds after doing so, I noticed a strange noise from under the truck. The “gasping” sound is from Freon loss. A ticking or tapping noise upon startup is also common. When you hear the audible sound of hissing coming from your car battery, that is the result of pressurized gases escaping at a rapid rate through a small vent. I have had the brake pads and rotors replaced within the last few thousand miles, so they aren’t worn. I couldn't see any disconnected pipes when I had a look around the turbo. The noise is constant from when I start up the car- to when I shut it off. I can only describe the noise as a hissing whoosh. I can clearly hear it when driving down the road and in a higher gear with low rpms (and exhaust is quiet) and when I give it gas, even with the slightest amount of gas but Quick Navigation Your car doesn’t just make noise when it is running. The wife wants to check out her newly fixed A/C and go for a drive. When carbon builds up in your engine, it causes the air-fuel mixture to ignite prematurely, producing a knocking sound. In fuel-injected cars, the EVAP system—that’s the evaporative emission control system—runs quick checks while your car is on, and after you Dec 17, 2021 · Squealing sounds may mean your car needs new brake pads, while a hissing sound can be a sign of a leak. If the car is running. Why is my car making a high-pitched whining noise? Feb 14, 2023 · In addition, when the piston’s ring comes loose, a ringing sound will appear on your vehicle, typically at high speeds. it seems to be coming from the left hand side of the car right near the turbo Feb 11, 2023 · While whistling noises can happen for a variety of reasons, an increase during acceleration generally points to an intake leak. Engine misfire: An engine misfire can cause a popping or pinging noise when you release the gas pedal. If low on fuel (less than 1/4 tank), the fuel pump starts to heat up and make the whooshing or hissing noise. May 4, 2023 · A slight "hissing" noise is normal when the a/c compressor kicks on. When I got to the Dr. The hissing noise lasts about 20 seconds and then stops. You can take the following actions: Step 1: Examine the AC compressor. The hissing sound is often caused by pressure build-up in the cooling system, which can be attributed to various factors such as a faulty radiator cap or a leak in the system. The increased speed adds more air to the window pane and creates extra noise. A hissing sound coming from underneath your car’s hood is a serious issue that can be caused by common problems like: Dec 11, 2001 · I have developed the hissing sound under the car. Parts are not very expensive, but in many cars the components of the PCV system are installed under the intake manifold. If the hissing comes from your engine, it’s probably because your car is overheating. If this sound occurs after the car is turned off, it's your car's way of equalizing pressure. Oct 15, 2020 · Usually when a car is making a sizzling or hissing sound after the engine has been shut off, it means there is something in the engine bay that's leaking. I also don't have any codes either. It doesn't stop, and it's loud enough to be heard over the engine. Jan 31, 2012 · My guess is the hissing and leak are two different things. I don't know if it's from the front area (engine) or exhaust under the car. Various items can cause noises from the dashboard. It may feel like a jerking or vibrating motion. Your cat is in pain “If your cat is seeking attention, but then responds by hissing or growling when pet, or consistently hissing upon repeated physical stimulation of a certain area, that may be an indication that your cat is experiencing discomfort,” Dr. It is like a leak or vacuum leak is sealing itself at that point and power really comes back on. As with most unusual car noises, the cause of hissing can often be diagnosed by working out where the noise originates. Cooling System Normal Operation. A little bit of under or overpressure in your fuel tank is fine, but if it seems to be a lot more than usual, you do probably have a problem with the EVAP system. 's office I opened the hood expecting to find a hose that blew. In addition, you might also notice a loss of acceleration and power, reduced fuel economy, and a strong gas smell. It's located mainly around the rear driver side, but can also be heard distinctly from the passenger side too. What could this be? Jul 21, 2023 · Picture it as the personal fitness trainer for your car’s engine, making sure it doesn’t overheat while working out. Hissing Sound from Under the Car Hood A hissing sound coming from underneath your car’s hood is a serious issue that can be caused by common problems like: Coolant leak: Your car’s coolant system removes excess heat from the engine and maintains its temperature. This isn’t usually a noise you’ll hear inside the cabin but one you might notice if you have the aircon on and the hood up. Jul 16, 2021 · What if you hear a hissing sound coming from your car? Here’s what it might be. This leakage can manifest as a hissing noise, often heard after you turn off the engine. A hissing or sizzling sound coming from under the bonnet when you’ve shut the engine off isn’t a good sign because it means something somewhere is leaking onto a heated engine component. Regarding the dealer issue, I have not seen a survey yet so I'm considering sending a note to the dealership just to let them know they lost a service customer. I don't notice any lack of power or driving issues though - just the noise. Vacuum leaks often produce an audible hissing noise created by air being drawn through the failed hose. It sounds just like air leaking out of my tires, but my tires are fine, and the sound only occurs when the car is on. Feb 6, 2023 · Although a broken AC compressor can lead to hissing noises, it’s the least likely cause so far. The cost to fix the hissing noise in car AC can vary depending on the cause of the issue. May 13, 2020 · I've owned three Volkswagen Jetta tdi's now and this is the first one where I've had this problem I keep hearing a hissing sound coming from under the car so is that a vacuum leak or does anybody have experience with this. A hissing noise from your car’s engine while accelerating could indicate an underlying problem that needs to be addressed promptly. Nothing was wet and I checked all the fluids ,they were all fine. yxrumok oyw ilizko rvmlbu giclju syxlw rpnicgx xcwf dluvaypth pwutn