Car vibrating when accelerating

martineire

My volswaggen passet starts to vibrate when accelerating, the problem is intermittent, does not really appear to happen when just driving around town really when I'm goin out the country and I'm tipping along and accelerating, once I take my foot off the accelerator it stops. As said above it is a intermittent problem and does not always happen but happens more times than not. When it starts vibrating if I put the car over and put the hand brake on it still vibrates

Any advice on what the problem could be?

OREGATO

Diesel or petrol?

If diesel, could be the injectors.

Any difference when you clutch or declutch - if so, could be the clutch.

Any loss in power?

Chris_Heilong

could be a warped Brake disc.

Zcott

Sell it to a female friend ASAP.

martineire

OREGATO wrote: »

Diesel or petrol?

If diesel, could be the injectors.

Any difference when you clutch or declutch - if so, could be the clutch.

Any loss in power?

It's a Diesel

Have not really noticed anything with the clutch.

Now that u mentioned any loss in power I have noticed a slight chugging feeling (sluggish) ever so slightly tho only when accelerating when car is vibrating again its intermittent.

martineire

Zcott wrote: »

Sell it to a female friend ASAP.

Its That Serious???

biko

I guess worn engine mount.

Bitten & Hisses

Had similar symptoms on a Pajero a few years back. It was the Dual Mass Flywheel letting me know it was thinking of calling it a day.

martineire

Suppose it could be one of a number of possible causes. I'll just leave it till next service is due and have them to take a look at it. Car has just being NCT back in June and all.

Ardent

Does it happen at any particular speed?

robertxxx

It's expensive!

martineire

Ardent wrote: »

Does it happen at any particular speed?

Yea at about 100km/hr and above.

Does that narrow it down anymore?

pred racer

If its still vibrating after you pull over (if I read your post correctly) my money would be on the dual mass flywheel too. Or if you're very lucky a motor or gearbox mount.

alanmc

martineire wrote: »

Yea at about 100km/hr and above.

Does that narrow it down anymore?

Could this just be a wheel balance problem?

EDIT: Still vibrating at stand-still .... not a wheel balance problem. Ooops!

It's just the above statement confuses me.

Ardent

martineire wrote: »

Yea at about 100km/hr and above.

Does that narrow it down anymore?

Have you changed your front tyres recently? I would check there first, especially so if they don't have the same treading.

slimjimmc

Ardent wrote: »

Have you changed your front tyres recently? I would check there first, especially so if they don't have the same treading.

Once it starts vibrating it stays vibrating even when stopped. Tyres won't cause that.

martineire wrote: »

When it starts vibrating if I put the car over and put the hand brake on it still vibrates

martineire

And if all comes to all and it is the dual mass flywheel, how much would that cost?

pred racer

Dont know for the passat, but ballpark €700 to 1000. (including new clutch)
For my car its €1100

Edit: thats including labour.

elizaharry

Sounds like you have possibly a clogged fuel injector or bad fuel injector and your car is only running on all but one cylinder.

martineire

elizaharry wrote: »

Sounds like you have possibly a clogged fuel injector or bad fuel injector and your car is only running on all but one cylinder.

Just a quick update on my situation. I haven't got the car checked over yet but just there now when driving this morning the exhaust gas warning lamp lit up and is staying on constantly. I'm wondering now is this all interlinked? Could this shed anymore light on my problem?

I'm goin to get it checked tomorrow anyway.

Hal1

Get her terracleaned. It cleans the entire exhaust system out. It would be worth doing on a daysul.

martineire

Hal1 wrote: »

Get her terracleaned. It cleans the entire exhaust system out. It would be worth doing on a daysul.

But do you think the exhaust gas warning lamp is now related to the vibration problem ie blocked fuel injector/bad fuel injector?

Mar4ix

if one of injectors at fault , diagnostics will show it, one my friend had one injector faulty, but there is four of them, connected to vag-com , it pointed on first cylinder misfire. replaced first cylinder injector, all went good. Does it smoky , when it wibrating and you accelerate ?

Hal1

It could be the EGR valve that's got cloged up with carbon deposits. The terraclean would flush out all the carbon deposits from injector to exhaust tip. I would start up just getting the codes read by a garage though.

dgt

At speed an annoying vibration comes into my car (406) but it's the gear linkage vibrating off the exhaust

If I were you I'd start looking at the rubber consumables like the bushes at the front, mounts etc

Cycling Dumbasses

I would agree with other posters and say its the DMF.

heroics

I was wondering have you sorted this OP?

I have an audi A6 with what sounds like the same issue. Usually between 2000-3000RPM is when its worst. Only started happening in the last month. Feels like the car is being driven over rumble strips. When it happens if I pull over the car still vibrates. Also I have noticed the rev counter does not move smoothly when the issue is happening it kind of jumps through the revs.

Does not happen all the time only intermittently.

2 weeks ago replaced clutch and DMF and has not resolved the issue. (800€+VAT)
No warning lights on the dash

Car is going in for a service and timing belt tomorrow so hopefully they will find the issue.

martineire

heroics wrote: »

I was wondering have you sorted this OP?

I have an audi A6 with what sounds like the same issue. Usually between 2000-3000RPM is when its worst. Only started happening in the last month. Feels like the car is being driven over rumble strips. When it happens if I pull over the car still vibrates. Also I have noticed the rev counter does not move smoothly when the issue is happening it kind of jumps through the revs.

Does not happen all the time only intermittently.

2 weeks ago replaced clutch and DMF and has not resolved the issue. (800€+VAT)
No warning lights on the dash

Car is going in for a service and timing belt tomorrow so hopefully they will find the issue.

No sorry I did not bring the car in to get checked over. My car is due for a service within the next few months so I'm goin to wait till then.

Did you resolve the issue yourself in the mean time? If so what was the problem?

Thanks

heroics

martineire wrote: »

No sorry I did not bring the car in to get checked over. My car is due for a service within the next few months so I'm goin to wait till then.

Did you resolve the issue yourself in the mean time? If so what was the problem?

Thanks

Got the new TB done on Friday. When that was being done they changed the fuel filter as I found the same issue on a couple of the Audi forums and that was the first recommendation.

Car is running much better now. No sign of the vibration since and I did about 200km over the weekend. Fingers crossed that is all it was.

heroics

Hey martineire

Just said I would give you a quick update. I have done about 800km since the work was done and not had a problem with the vibration since. Looks like the new fuel filter sorted it.

Heroics

martineire

Mar4ix wrote: »

if one of injectors at fault , diagnostics will show it, one my friend had one injector faulty, but there is four of them, connected to vag-com , it pointed on first cylinder misfire. replaced first cylinder injector, all went good. Does it smoky , when it wibrating and you accelerate ?

Just a quick update, diagnostics showed its an injector problem after all. Second cylinder is misfiring. Can anyone tell me where I can get a second-hand/Reconditioned injector. Think a new one is 600 :eek: