Touareg :: Exhaust Noise Upon Medium To Heavy Acceleration
Jun 20, 2007
I have noticed since day 1 of owning my v8, that there i a horrible sound that comes from the exhaust upon medium to heavy acceleration - a loud fluttering is the best way i can describe it. I took it to the dealer and one tech said something was definitely wrong, the other went and got a new reg off the showroom floor and demonstrated that it is common and normal. Although another new reg did the same thing, i am not convinced that this obnoxious sound is normal ...
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Not long ago my wife said the air recirc doesn't work any more on our '04 V8 and I had to admit that I agreed. After a little investigative driving, I noted that heavy acceleration (or uphill climb) causes V8 to tick (can hear it reflecting on passing walls, for instance) and strong smell of exhaust in cabin.
I thought it might be a manifold/exhaust system leak causing the noise and the exhaust smell. Seems to be only when driving aggressively or climbing. Soonest the local dealer can see it is 7/21 (16 days from now). You think it safe to drive?
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I have been getting some knocking the under most any loads . I do not have any codes. I tried premium gas and that did not make any difference. If this is not fixed what issues can this cause? What should I look for do get this fixed?
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I just went APR Stage 1+ (APR hpfp plus VWR intake) and am loving the noticeable power gain from Stage 1. But under hard acceleration I'm getting a strange noise (sounds like wheelspin or tire screech and sounds like it's coming from the front tires) when I disengage the clutch to shift at higher (5K+) rpms. It is not metallic sounding (it sounds like burning rubber) and lasts for a split second then goes away.
For those of you who've had tuned GTIs, it essentially sounds like what my Stage 1 GTI sounded like when too much torque was going to the front wheels and I spun my wheels before I got traction.
It doesn't happen as I re-engage the clutch and it doesn't happen any other time (quick but not WOT acceleration or normal driving). It also didn't happen under hard acceleration before I went from Stage 1 to Stage 1+. Furthermore, I'm not having any issues with difficulty shifting or engaging gears at any time. My R is 1 month old and has ~1K miles.
I've searched the clutch/transmission troubles thread, and other threads, but haven't come across other sounds/symptoms that seem similar.
At first I was thinking it was just a split second of wheelspin from too much torque as the AWD kicked in, but that doesn't seem to make sense (or does it?) since it only happens when I'm disengaging the clutch. Any thoughts before I start thinking the worst?
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02J-EGT 5spd. OEM axles.
Sounds like it's coming from the front. I noticed a few months ago my inner passenger CV boot was cracked, put motor mount spacers in which should have hopefully brought that axle up to okay standards. My initial reaction is to say the howling is from that CV joint however it's very odd it only happens after 35 and when I'm not heavy accelerating or deaccelerating- only when holding the car at a constant speed.
This also came after doing the TDI 5th. I notice it a little bit after passing 35mph in 3rd but really can hear it in 4th/5th when the engine revs drop. Am I right in thinking CV boot? Or transmission internal?
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I have a 2007 LS460L. Bought it new and have loved it dearly for 6 years now. It now has 70k miles and is under an extended warranty purchased at 50k miles. As a first year model it has had a ton of TSBs done on it.
The problem i have had as long as i can remember is a lag or stutter during medium to hard acceleration. It feels a little like the old turbo lag or like a very mild stutter. It has had the transmission adjusted, had the service manager driver it for a week to try and capture on computer etc. But nothing has fixed it. At times it feels like if you watch the tachometer during these moments you can actually see a bounce (I may be imagining).
I have almost given up and just lived with it. We have tried tranny, type of oil, software tweaks etc.
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My truck has about 100,000mi and has had all the scheduled maintenance.
My 2006 5.4 engine cuts out under medium acceleration when accelerating from a stop. Happens when warm or cold. Works fine under light acceleration. Cut out happens before it shifts into second. Cuts out just for a second, then resumes. Stumbles twice under heavy acceleration. Very repeatable.
I noticed the gas was low - above E but below 1/4. So I filled up at the gas station. The problem went away. I had this issue with a 1980s fuel injected VW - it would get a vacuum lock on the gas tank. But with this truck I did not notice and inrush of air when I took the gas cap off.
I suppose it could be the gasoline sloshing towards the rear of the tank, away from the fuel inlet pickup.
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On the way home today upon medium acceleration I heard a pop kinda like a backfire ......now black smoke pours out on acceleration.no much in line of power either. Hoping I haven't screwed the motor ...
6.0 ltr turbo diesel 2004 f-350 super duty crew cab 4x4 ....
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Starts good cold and hot. Taking off like a grandpa on an evening drive don't notice a thing. Only codes that keep coming up are 2614 and 2617 which are cmp and ckp open curcuit codes and a software incompatibility code for FICM which is due to the updated software in the fresh FICM I installed. HPO pressures are good, has boost, idles smooth, revs nice when in park. New injectors (cause it was running rough especially cold before) and CMP and CKP (because of the above codes and didn't change)and ICP and IPR (last 2 installed because of HPO codes that are gone now with the IPR and ICP). Fuel pressure is 65psi (updated spring). When you step on it while driving it sputters and bucks like it's out of fuel, let off the throttle a bit and it purrs like a kitten. I'm a little stumped. I think it puffs a little white/blue smoke while it bucks.. not much tho. and it comes in little puffs. Took off filler cap and there is almost no blow by.
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Well lately I haven't driven my truck much. Usually only on the weekends if Im lucky. Well I drove it today and I noticed this weird noise on acceleration. I have the cam phaser tick and have had that for about 50k miles or so. I started to think I was getting a manifold leak and that's what I thought this noise was until when I pulled over and put it in park and revved it up I did not hear the noise again.
It only does it when you hit the gas until you get to a steady rpm. I only drove 5 miles or so. So I couldn't do much testing cause its late and I got to get up in 4 hours. I don't even know how to explain the noise. It kinda sounded like an exhaust leak but it was more of like a lite thud noise I guess. Like I said it only does it when I hit the gas when its in drive but not in park. I tried to explain it the best I could. I just hope its not phaser problems cause I don't want to dump a bunch of money into it.
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My car if left on in park for 3-4 minutes starts to have a heavy smell of something... Is my car running a little rich or is there a more serious underlying problem?
RPM of car idle is 750.
And car doesn't smell like fuel when I'm driving, only if I leave the car running for a while and it sits there does this smell begin to build up.
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When accelerating quickly with v10 get a noise like that of speed bumps on side of highway(bumpy humming) for a split second and then goes away. No change in performance but just had 2 new rears put on and alignment done.
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I have an 04 V8 and have consistently noted a valve(?) clatter noise under moderate to hard acceleration. I mentioned it to my VW sales associate and he stated this is typical of this engine and that after warm up it should no longer occur. I hear the clatter at any time, warm or cold.
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I have a 2006 Touareg with the V6 engine.
Recently, the oil light / shut engine off light came on, and during deceleration, an odd chirping noise was heard.
Oil level is fine. Previous owner claims to have had it changed every 6k with full synthetic. What the culprit might be?
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Under heavy acceleration my car surges. I have already put a new stock diverter valve on and no change....I am thinking n75 is next on my shotgun list?
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So this vibration/ cluncking seems to be from between the front seats and mostly during off the line acceration, and from all I can find it's the flex disc, but my flex disc shows no signs of damage. Can these discs go bad without looking bad or is this possibly the hanger bearing on the driveshaft?
I am also looking for any other possibilities for the cause of this vibation/ clunking as there sounds like something is hitting the bottom of the car but there are no impact marks to show me where the issue is
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B5 Passat wagon coil over installation Vibration happens during acceleration.
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Just bought my R a few months ago and love it so far. I've recently encountered a slight buzz or vibration. I'll get down to the nitty gritty and not bore you with long drawn out information. Basically under heavy acceleration the driver side vibrates/ buzzes down by the floorboard. Now this only happen under heavy acceleration. I even did a test in 1st gear. Heavy accellerate under 2k RPM's, 3k RPM's, 4k RPM's and the vibration happened under these heavy acceleration periods. It's almost like there was also a loss of power during this vibration/ buzz, which leads me to believe it might be the clutch.
I took off the prop shaft and drove in FWD for a few weeks. The vibration was still prominent. Took of both front driveshafts and inspected those and they seem perfect but THE VIBRATION IS STILL HERE. Could this be the clutch?
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If you have an intake and are under heavier acceleration, do you get any vibrations in the car while getting that growl sound?
I have the intake pipe zip tied so that it is away from the brake lines but I'm trying to figure out if the vibes are coming from just the sound frequency or something or if it's something else.
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Here's the story on my truck. Spits and sputters between 40-60 during heavy acceleration and on rare occasions will jerk/pop while at a steady speed. No engine or wrench lights. I thought it might be the fuel filter and changed that, it didn't work. I also ran two bottles (on 2 separate occasions) of Duralube extreme fuel system cleaner, that didn't work either. So, I took it to the Ford dealer for a diagnostic. They had a hard time getting it to act up but said it finally misfired on #8 and recommended replacing the ignition coil and plug. I did that, still have the same symptoms. So, I thought it might be the fuel injector and changed that. Still same symptoms and ZERO dummy lights.
After several YouTube videos, I thought it might be the TPS and got one. Before I changed that however, I cleaned the Mass Air Flow sensor, still same symptoms. I finally changed the TPS, but the engine wouldn't start or run at all, no warning lights yet. When I put the old TPS on, it would run. I unplugged the TPS and it still ran but very rough. Now the engine light IS on! Thinking I purchased a bad part, I took it back to O'Reilly's and they warrantied it out and gave me a new one. I had 19 PO codes. I changed the TPS again, and, it won't start or run at all. Put the old one on and it runs. They cleared the codes and told me they think it could be the ECM/PCM.
Why will a new TPS not work? I still have the same issue of hesitation @ 40-60 during hard acceleration. No hesitation during a moderate acceleration.
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I have a 2009 lexus es 350. Its my baby since new. I have around 75,000 miles on it. Recently when I start the vehicle I noticed a heavier than usual exhaust smell, with some very very light white exhaust. The car seems to drive fine in every way.
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