Hissing Sound From Engine Bay

Creative Commons Attribution 3. Royalty Free Sounds are sounds that are free from royalties. It even resists temperature extremes '-40 to +150 degrees Celsius' making it suitable for an engine bay. common areas to look for are: rubber hoses, radiator expansion tank, water pump, radiator cooling fin, etc) - left to right, cheap to more ex. So, I popped the hood and sure enough the sound was coming from the engine bay on the left side. Goodmorning, my car sounds different but i dont have a check engine light on ive had it for a couple months now and i just got my breaks fixed and got a oil change. obd 1 conversion to come the same time as the rebuild. I am unable to turn the engine with the pull cord. The car in question is a 2007 Nissan Altima 2. Car in question is a 2007 Nissan Altima 2. Actually a lot less than I imagined. A buddy of mine drove his truck to a ski area and heard a strange sound from the engine bay after he turned the motor off. The brake servo is forced into a strange existence; half in the engine bay, and half under the wing. It sounds like it may be coming from the exhaust mainfold but im not sure. What does it mean when I hear hissing when I apply the brake? in the engine bay (steel wall between cabin and engine bay), is 6"-7" dia. Vauxhall Corsa C - Hissing sound under the bonnet - elekie&a/c doctor : The inlet manifold,vac pipe and servo are all accesible from on top of engine bay. It stopped over them, and was described as an almond shaped craft pointed at the ends. It goes away when I turn the engine off. I could not tell where it was coming from inside. E46 320d engine hissing sound with exhaust smell. We are New Zealand's only exhaust component specialist. It happens at all speeds and only when I accelerate. BlueDevil Products Auto Blog! One in the engine bay fuse box and one in your under dash fuse box for the blower motor relay. Mechanic's Assistant: Where exactly do you think the noise is coming from? And how long has this been going on? I'm not sure. In my new punto 2012, I am facing a similar issue: AC had stopped working a month back, got it serviced. It is not a whistle and seems much too high frequency to be described as ticking. Hoping someone can help. Today I installed my "loaner" PCM from PCM4Less and my K&N FIPK. The symptom is a clonking/knocking sound from the front suspension, mostly noticable at low speed, a quick test is. The engine may run well at higher RPMs, but surges, runs rough and struggles to maintain stable RPMs at idle. Maybe you'll get lucky and find the loose joint inside the engine bay. We examined it and after awhile we turned the engine off for a few minutes. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. Still a hissing sound from left engine. BlueDevil Products Auto Blog! One in the engine bay fuse box and one in your under dash fuse box for the blower motor relay. Description: Hissing sounds like air or steam escaping from a pipe or hose. no loss of braking, servo functioning correctly and only makes sound with engine running, yet there is a brake fault and was subject to a Renault recall. If when you turn off the jeep and you hear a hissing sound after for a second you have a vacuum leak. We are New Zealand's only exhaust component specialist. obd 1 conversion to come the same time as the rebuild. It seems to go away when the tach gets right at 2500rpm then comes back when it shifts. No sound above or below and can last several seconds if I maintain that RPM. Engine running rough, hissing sound User Name: there is another vacuum thingie on the far left of your engine bay right of the strut tower and above the power. It sounds like you have air in your power steering system. For some, that sound is actually the reason they want an aftermarket setup. If you can't find it by just looking and feeling for bad spots on hoses, get a 2' length of hose. Sometimes (bout 1 out of every 10 times) when I'm accelerating (can be WOT or not) there is a hissing noise in the engine compartment. The wife wants to check out her newly fixed A/C and go for a drive. 6L 3-valve or 5. however, its not a very noticeable difference in performance. If you do not have a burrow of the Kafka sort the snakes hissing outside the hole will defeat you and there will be no peace of any sort. Interesting, because I just started up the engine did what you said. This car changed the market rules, by insisting an increase in sales even after an increase in price. I also get this hissing sound sometimes so I had mine checked by a friend who’s an auto mechanic. When I got it home and opened the bonnet I could hear a hissing/vacuum like sound coming from under the plastic cover. I thought mine was hissing in the summer and it was a rubber hose that had perished near the bulkhead, but then was coming out under the car. So what does a hissing sound mean?. Overly Noisy Engine. The first obvious symptom will be the smell of exhaust fumes coming into the cab, and the confirmation is the hissing coming from behind the engine. Theres a hissing noise from my brake booster with the engine on and continues after few seconds turning the engine off. Its always the same frequency and is definitely distinct from the supercharger whine. Thanks guys, Rjudgey, my car is only two years old, 46k miles. This is more of a whistle sound (kinda like a tea pot) 3. What would cause a car to shut off then a make hissing noise? The hissing would be caused by cold water contacting hot engine parts. The Question Section. I have a 2003 Tacoma with about 115,000 mi and I'm starting to have this unusual grinding sound that I've never heard before during the end of my braking (and kind of feels like the brakes are slipping). It even resists temperature extremes '-40 to +150 degrees Celsius' making it suitable for an engine bay. Anyone have ideas/heard this before??. They came unhooked when I was moving things around apparently. Hi all, I have just looked at a very clean ML 270 Diesel, 2001 reg with 90k on the clock. High and erratic idle plus air hissing from brake pedal 2 Answers. Hi, I have all mods in my sig and have about 25k on her. Readers Rides. In fact in the engine bay, you can barely hear the sound. Cade clambered a few feet down, hissing as the world spun. It's a fluttering/hissing sound. Explore KOHLER toilets, faucets, sinks, showers and other kitchen and bathroom products. In my opinion this could be easily fixed with a quick visit to a Ford dealer - the 2. The sound is coming from the belt on the drivers' side of the engine (which is exposed when you open the bonnet). Look at your dashboard; if the check engine light is on in conjunction with idle issues, it may be because the idle control valve is malfunctioning. When she reaches above 2500rpm she starts making a hissing flutter sound from the engine bay. Moose in the next post has some good ideas. After that the sound is indiscernible. I thought it was coming from the speakers at first, but upon checking the speakers, I was able to isolate the sound to right under the glove box - maybe coming from the firewall to the "engine bay". Throttle response is pretty poor also. Was putting the car in the garage today and noticed it was making a fairly loud hissing noise. The lights suddenly went out and the craft descended making a hissing sound. Usually a bad or failing exhaust manifold gasket will produce a few symptoms that can alert the driver of a potential issue. [Archive] Faults, niggles, recalls, rattles, stuff that doesn't work properly, design deficiencies and damaged cars for the 9G (2012 onwards) Civic. The first I believe is a fuel pump that continues to make the priming noise rather than just briefly. It sorta sounds like air being released from a tire. It was not the tyre though! It was the exhuast pipe hissing out liquid under the engine bay. Pay close attention to leaks from your automobile’s engine. It goes away when I turn the engine off. SO I noticed on thursday a hissing / shhhhhhhh sound constantly coming from the engine bay, i can hear it while inside also. Troubleshooting vacuum leaks requires a close visual inspection of the hose, making sure it's properly connected, and listening for the telltale hissing sound of the vacuum leak. Online Tone Generator offers three flavours of noise: white, pink and brown. 0 engine is well known to them due to it's common (and very worthy) application in the Mondeo 2. If you can first confirm the hiss only being associated with pedal movement and thenthat it's coming from inside and not in the engine bay then take the lower dash off - you will be able to have a poke around. provided the sound does go away within seconds after the engine is started. Even if you don't need a new water heater right now, chances are you will within the next few years. Likewise, noise is excellent at supressing muffled sounds that come through thinly walled rooms like those in university accommodation or office space. Cause: These three sounds often go hand-in-hand with an overheating engine. This seems MUCh more pronounced. These are 2 different symptoms of different problems. Brush off the dirt and find a few phillips head screws to remove the splash panel. The sound only makes its appearance when you press on the accelerator, if I'm going 80, then left my foot off and slowly cruise down the sound disappears. Due to the amount of noise present when the engine is on I wasn't able to pinpoint where the hissing was coming from exactly. All you need to know is what the problem feels like, looks like, smells like or sounds like. Oh and I think I can also hear a hissing sound coming from the engine bay, cannot determine where from though, I have got a piece of old pipe and listened to the engine bay and I think its some where around the EGR pipe near the firewall. The hissing has occurred in three different airplanes (two Skycatchers and a Sling). either way you need a new brake booster. It eventually went away, but it. Its either behind instument panel or near that area around engine It does not increase with engine rpm. The fume smell only started today, but the whooshing noise started a couple of days ago. ) in-line four cylinder engine is a double over head camshaft with hydraulic lifters and four valve per cylinder design. Hi, I have all mods in my sig and have about 25k on her. A bit of tape over the hole has removed the noise completely, so now just need to replace the hose!. 0i engine bay hissing noise If this is your first visit, be sure to check out the FAQ by clicking the link above. Explain the difference between a focus and an epicenter. On accelerating, especially under load in 3rd gear and up there is a high pitched hissing or fizzing sound coming from the engine bay (?RHS of RHD car). Another pipe goes to a solid pipe that crosses the engine bay along the bulkhead above the negin under the bracing. Can't be healthy to have the left this cool. Please check out the new club website for the Cayman Club at www. on it bounces from 850 to 2200. No more washing with hot engine. If the sound stops when one of the belts is. Took about 2 hours for both and I was really taking my time. When accelerating hard, above the sound of the engine I get a sort of a hissing noise, is this induction noise or is it related to the auto box?. When listening to noise, many people are reminded of the sound of rainfall or waterfalls. Symptoms of a vacuum leak include the Check Engine light, rough idle, stalling and a hissing sound coming from the engine bay. However, there is a possibility that valves need adjusting. When the engine is turned off there is a lous hissing [air sucking] sound just after the motor dies. If I stop and park the car for five minutes, it'll go away for a short while. Most of the time I do sit in such a calm and defended library that I have deliberately constructed inside my head and inside my writing room (my bedroom). The compressor was not on, nothing was on inside the car, but it sounded like it was cutting on and off. Sound: A hissing sound coming from the area around a gas appliance is a sign of a gas leak. Step 4 – Power steering whine. Remember that the fan belt is needed to operate not only these critical components but the engine as well. Find and buy replacement parts online. I started checking the tires but couldnt locate the exact area. Normally last about few seconds only Comes on and off wondering if it may be the fan belt. No change in frequency with accels. It's been a few days, I heard sound come from the engine bay like is sucking air. There are different levels of hissing, as we’ll explain here, but the bottom line is that hissing isn’t a sound you want to ignore, especially with summer just around the corner. Starter Motor Repair: This instuctable will show you how to repair a starter motor off a Toyota Corolla FXGT. Environment > Nature Have you heard 'the hum'? Mystery of Earth's low droning noise could now be solved. The odo is 161k KMs. amyjones2002 Posts: 2 i pop the hood but dont hear anything in the engine bay 1. Within the first half-hour (when the engine warms up), the sound disappears. While there are things in the engine bay of your F-150 that could fail and cause a hissing noise, if your truck is running correctly when you hear this hissing noise on shutdown, the odds are good that it is just the air conditioning system depressurizing. Related Articles. Then noise comes out (that mean noise comes out when engine running with load). A leak like that might make your car sound like a. This sound comes from right behind the speedo area. 05-19-2017 10:22 AM #1. I've noticed when hitting the accelerator, not hard but a decent little tap, air seems to be escaping from somewhere within the engine bay. 5)Turn on your heater to MAX DEFROST 6) You will want to run the engine until warms up and kicks off of high idle and then a few minutes after that (or until operating temp). While the engine is one of the best Ford has ever engineered, based on warranty repair numbers, it does require care and proper maintenance, like all engines. All you need to know is what the problem feels like, looks like, smells like or sounds like. Please check out the new club website for the Cayman Club at www. Cayman S Hissing noise from engine area while driving. I thought it was coming from the speakers at first, but upon checking the speakers, I was able to isolate the sound to right under the glove box - maybe coming from the firewall to the "engine bay". A pedal will go to the floor completely based on hydraulic and mechanical operations. Often, the engine stalls when stopping. High and erratic idle plus air hissing from brake pedal 2 Answers. cold air intakes are pretty much worthless, the sound your hearing is probably from the lack on intake silencer on the K&N compared to the stock intake. For among the problems was a 5ft python curled round the. Can hear it inside the cab under the dash. In idling no noise. No more washing with hot engine. My truck is an 05 GMC 3. round, black or silver. All American Mack. 8T, recently my car has been making a hissing/gurgling noise from the engine bay after shut off. 24L and i was recently jumping another fiesta the same as my own and I heard there was a hissing noise coming from my engine bay that wasnt coming from the other car, Any ideas what is could be and is it a major concern?. Brush off the dirt and find a few phillips head screws to remove the splash panel. Finally I was able find out where the noise coming from. I've noticed when hitting the accelerator, not hard but a decent little tap, air seems to be escaping from somewhere within the engine bay. I have taken off the steering console and the noise is definately coming from the the top of the steering column. However, I also hear a hissing noise around the transmission fluid dipstick, which is also where the A/C low pressure line is IIRC. How to Tell if a Timing Belt Tensioner Is Bad. 06 mk5 gti 2. Chris is right, you could be causing long term damage to your engine. This basically sounds like you have air brakes when shifting and sounds like air is escaping out of the intake instead of going to the turbo and to the engine. started to open my window when driving past buildings, as you can here it much better. I have done everything I can think of. There have been complaints that some Ford vehicles equipped with a 4. I had a hissing brake pedal on my 1992 Cutlass Supreme Convertible (3. This is a new one for me. Anyone ever gotten a hiss sound from the gas tank area ? It seems the car runs and idles fine , sometimes u can hear a sound , id discribe it as if u ran over a nail and u get that air coming out sound , but from the gas tank i crawled under while the car is on and i noticed when it makes that sound it lets off raw gas smelll so bad 1-3 seconds u cry , then itll stop making that sound and the. A folding cab apron spans the scale 2-foot gap between the engine and tender. Not there either. I tried looking for it today but the hissing was. I also hear a co. It hisses as soon as I turn on the ignition, and stays on. I'm hearing a weird hissing sound from the engine bay that intensifies with RPM. For among the problems was a 5ft python curled round the. Please wait while your search runs. Explain the difference between a focus and an epicenter. some people said it Could be a result of air condition equilising pressure. Sled was used in a normal way, no overheating, no other issues whatsoever. This is more of a whistle sound (kinda like a tea pot) 3. The engine is free-wheeling; meaning it has provisions for piston-to-valve clearance. It doesn't get louder when the engine revs, it doesn't go away when you put the truck in gear or turn the wheel. check all vacuum pipes and hoses for leaks when the engine is running your looking for any hissing noises ,use a length of rubber or plastic hose to your ear and probe around the engine bay with the other end like a stethascope it sounds silly but this is a very affective way of finding vacuum leaks. Sound happens when brakes are not in use. When the engine speed (not car speed) reached a certain RPM, the Hissing kicks in, constant frequency hiss. I recently just noticed when I start my car in the morning I get a hissing sound from the engine bay. Hello All, My girl has a 2014 Jetta automatic. The plastic cover over the air intake plenum,by the wipers, is the only part that needs to be removed. Four Common Car Noises, Their Causes, and How to Fix Them. One of my pulleys is making a hissing sound. for towing I can say my pocket has been hosed down by a hose!. The Paragon2 dual-mode sound decoder rides on top of the speaker enclosure. Our certified mobile technicians come to you 7 days a week between 7 AM and 9 PM. Well, the removal of POV and the. At first, I thought it was my water heater, but no. And it's the loudest right behind the front tires. 2012 ford fiesta noise from engine bay on passanger side, 2012 ford focus making a hissing sound on passenger side, 2013 ford focus noise coming from front in park, 2016 focus metal rattles, focus rs rattle noise, focus st hissing passenger, ford focus rattling engine noise from passenger side, ford focus spinning loud sound on passenger side. Retro Rides Store. It sounds like you have air in your power steering system. The first obvious symptom will be the smell of exhaust fumes coming into the cab, and the confirmation is the hissing coming from behind the engine. Eventually Henry will have an all over new coat - but for the sec he is going to need to get panels and structures dealt with. My airbox does hiss a little b/c of the K&N. Here's how I routed the hose in the engine bay. In the afternoon I walk through the little town to get some groceries and have a look at the nearby beach. Car in question is a 2007 Nissan Altima 2. I have a 2011 Mini Cooper S and it’s in the shop now with the check engine light on. This sound comes from right behind the speedo area. Please wait while your search runs. Finally I was able find out where the noise coming from. "Escaping air" sound from engine while turning off turning of my car's engine, there is a short "pffft" or hissing sound as the engine shuts down. [Archive] Peugeot 207 is a sub-compact unveiled in 2006. But on closer inspection it's coming from the front right engine bay and that too when car is idling and AC Switched off. hissing sound when shutting off engine of 2002 f-150 Post by dzodzo » Thu May 14, 2015 8:54 pm There is a sound like air pressure releasing when I turn off the engine of my 2002 f-150. I hear a hissing sound in the engine bay and one of the pipes don't look secure. Hissing sound after the engine has been turned off? was that when we turned off the engine there was a faint hissing sound from the engine bay. 4L Power Stroke Problems Common 6. When cruising at a very gentle throttle (say coasting at 65mph on 6th), there is a ‘hissing’ type sound coming from the entire passenger side of the car. That’s not exactly as I planned it. common areas to look for are: rubber hoses, radiator expansion tank, water pump, radiator cooling fin, etc) - left to right, cheap to more ex. If allowed to warm up for about 10 minutes it drives just fine. 4 Liter (148 cu. I checked the connections in the engine bay, but it sounds like it's right along the driveshaft. If you have a tapped egt gauge, I had one develop a leak that had hissing sound at higher boost. Only have a little space but want a lot of sound? Soundbars can help you achieve that goal. Whistling type noise from engine bay Dealership just called, they replaced the intake manifold and either a hose or a hose clamp and that appears to have taken care of the whistle. The supercharger hissing sounds like a vacuum hiss which can be normal or a dislodged vacuum pipe. This may be a stupid question, but I'm asking anway. Sometimes when i give my car light throttle i hear this spinning metal sound, kinda like a whirring noise, its hard to describe. What is a Tsunami? A seismic seawave produced by a volcanic eruption, an underwater landslide, or an earthquake. If you can't find it by just looking and feeling for bad spots on hoses, get a 2' length of hose. When I accelerate there is a load humming noise coming from the engine. Readers Rides. So if one of you could post a picture of your engine bay the upper right side is detail would be fantastic because the dealership isn't looking for the problem. This is not that noise. When I got home yesterday I was looking over my rig to make sure the crappy California highways did not shake anything loose and found my battery in this condition. Hissing noise when shutting off engine. Our certified mobile technicians come to you 7 days a week between 7 AM and 9 PM. About the size of a pencil. I had a separate alignment issue where the car would draft to the right, so brought the car to the dealer to get the car re-aligned and mentioned about the hissing noise. If when you turn off the jeep and you hear a hissing sound after for a second you have a vacuum leak. for towing I can say my pocket has been hosed down by a hose!. This issue may also cause your check engine light to go on. Cause: These three sounds often go hand-in-hand with an overheating engine. It hisses as soon as I turn on the ignition, and stays on. ˜e hognose feeds almost exclusively on toads and is most frequently found in sandy habitats. Hello everyone. I couldn't find any dye leaks anywhere around the engine bay, so could there be a problem with the evaporator?. Solution: A common problem is the blower motor resistor contacts corroding and/or a damaged resistor. hissing sound 3000GT/Stealth Car Forums. Even if you don't need a new water heater right now, chances are you will within the next few years. Jul 27, 2004 #10. Can't help with the hissing noise I'm afraid (or the digression into female flatulence) However, I thought the 84 turbo did have some sort of EGR valve? Whilst idling, mine one sounds like someone is banging a dustbin lid in the engine bay every 10 secs or so. I get a loud fast kind of gurgling noise from the engine at startup when the engine is completely cooled down. Not a constant hissing sound though. When there's white smoke, check first for coolant leak. I recently just noticed when I start my car in the morning I get a hissing sound from the engine bay. If you hear a loud tapping or knocking sound in your engine, pull to the side of the road and call for road. even when parked decided to move the wheel left and right and the hissing followed the steering wheel movement. [Archive] '05 TB LT making hissing sound at rearend area OEM Issues K&N recharging and cleaning, and deep detailing the engine bay. (2002 A6 2. How to do a leakdown and compression test. com Please bookmark us Ctrl+D and come back soon for updates! All files are available in both Wav and MP3 formats. Put one end up to your ear and the other end move around the engine bay where you think the sound is coming from. Any time you have a vacuum leak an easy way to tell where it is take carb cleaner and spray it around the engine bay if you hear the engine rev you have a leak in that area to narrow down the spot. Hissing noise could be just about from anything there - from a bad bearing on a pulley, to one of the VSV valves, to a leaky hose. 5 year old Optima Red Top (34R) in my 4Runner and noticed a hissing sound coming from it after driving it yesterday. Of course, to shut the engine down we had to release the bungee then hook it up again to start the engine. vehicle+ 1993 K1500 Suburban with the 350 /auto tranny/4x4 (do not think it is model suspecific) the suburban has 300990. add thats its magnified your in a garage with walls and main reason the 14's sound better is the insulated engine cover in the engine bay was changed for the 14's your car is fine, enjoy it for being the only car that can get 40 mpg at 70 on highway and 0-60 in 5. The first one related to transmission shifting, and indeed, car would not go into Autostick mode. Sometimes when i give my car light throttle i hear this spinning metal sound, kinda like a whirring noise, its hard to describe. Anyone have ideas/heard this before??. Get tips and ideas. A folding cab apron spans the scale 2-foot gap between the engine and tender. If I'm in neutral or park, it's much harder to hear, so. My truck is an 05 GMC 3. That's about $100 total for cart and stylus. So it does appear when the vehicle is not moving and the RPM's are revving. Hello everyone. Hissing Noise from engine bay. Hi everyone, I wonder if someone might be able to assist me? My range makes a hissing sound when the engine is running, sounds like air is escaping from somewhere; it only makes the noise when the engine is running and stops every time I use the throttle but then starts as soon as I release the throttle. Re: E90- Check Coolant light, hissing sound and water all over the engine Obviously, there's a leak in your cooling system and it could be from any one from a number of spots (e. Any ways to reduce the sound for now? Did you get your engine bay wet? They hiss for a while if the belts are wet, but if it. It is controlled by a round pulley called a tensioner that keeps the line taught as it. Looking at examples of adjectives can make it easier to understand how these important parts of speech are used in the English language. Valve Train Noise. I have a 2011 Mini Cooper S and it’s in the shop now with the check engine light on. Sometimes when i give my car light throttle i hear this spinning metal sound, kinda like a whirring noise, its hard to describe. Sometimes (bout 1 out of every 10 times) when I'm accelerating (can be WOT or not) there is a hissing noise in the engine compartment. E46 320d engine hissing sound with exhaust smell. I'm hearing a weird hissing sound from the engine bay that intensifies with RPM. Start your engine, and you must immediately feel some depression on the boost hose (put your finger on it), as well as a hissing sound. Opened the bonnet and checked but couldn't feel any air leakage but hissing sound quite prominent. I needed to make a trip somewhere this morning at around 8AM when about 3 minutes after start-up, I started to hear a "hissing" sound. When I open the hood, I definitely hear the accessory belt rattling. This leads to predictable problems. I'm hearing a weird hissing/whooshing sound from the engine bay that intensifies with RPM. In my new punto 2012, I am facing a similar issue: AC had stopped working a month back, got it serviced. Creative Commons Attribution 3. Hissing or "Pfffttt" sound from engine bay. I don't know if this is a problem, but I never noticed it during the first two months of owning the Forester so thought maybe it is something that deserves attention: since two weeks I notice that my 2011 Forester makes a weird hissing sound when the engine is on. 6L, and the noise IS coming from the engine bay area, it is not coming from anywhere else on the car. While there are things in the engine bay of your F-150 that could fail and cause a hissing noise, if your truck is running correctly when you hear this hissing noise on shutdown, the odds are good that it is just the air conditioning system depressurizing. Brush off the dirt and find a few phillips head screws to remove the splash panel. Due to the line and evap placement in these cars it's much more noticeable with the audible hiss noise. So, I popped the hood and sure enough the sound was coming from the engine bay on the left side. For among the problems was a 5ft python curled round the. Loud sucking/ hissing noise coming from engine bay? 3 Answers. It sounds like a sort of bird chirping/hissing coming from the drivers side but disappears as the engine warms up. Compare the hissing sound made by the air being sucked into each carburettor. Hi guys,see if you shed any light on this one,on the way home earlier, going up a steep hill,we heard a loud hissing noise, and smoke ,pulled over immediately, and engine stopped. The car has an stock engine 3ZZ FE but vvti is not enabled in this engine in my country from factory (Pakistan). RepairShellService. When i give it more gas, it stops thoughim curious as to what this isi cant tell 100% where its coming from, but it sounds like either the engine bay or underneath the car somewherei know its vague, but if anyone can offer me some suggestions, i would. Royalty Free Sounds are sounds that are free from royalties. some people said it Could be a result of air condition equilising pressure. My car starts up okay but just how it sounds just sitting there doesnt sound the same the engine sounds different. I needed to make a trip somewhere this morning at around 8AM when about 3 minutes after start-up, I started to hear a "hissing" sound. Can't be healthy to have the left this cool. Please wait while your search runs. If you hear a loud tapping or knocking sound in your engine, pull to the side of the road and call for road. A/C bypass pulleys from 1A Auto offer a great alternative to air conditioner compressor repair. Sled was used in a normal way, no overheating, no other issues whatsoever. This is all new to me. In addition to causing the check engine light to turn on, vacuum leaks can lead to problems with acceleration.