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2005 Audi A4 Constant Slight vibrations from accelerator pe

Tiny
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Shakes or Wobbles problem
2005 Audi A4 Two Wheel Drive Automatic 73600 miles

I have a 55 reg A4 B7 2.0 TDI CVT done 73K. A month a ago, I noticed a slight vibration almost feels like a hum in the gas pedal. It is always presenting even at idle, especially can be noticed when the car revo up to 1500rpm, and smooth a while around 2000rpm, then vibrates again from 2500 onwards. I can also feel this kind slight vibrations from the brak pedal and steering wheel. I suspent the vibrations from the engine side. I have had it into the dealer a number of times and they can't find it and now say that they can not feel it. Heck my friend can feel it so I think they are just trying to get out of a repair. Recently, the vibrations getting worse when I am driving on the motorway. It is indeed annoying me. Please help!
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Saturday, July 31st, 2010 AT 6:30 PM

18 Replies

Tiny
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Hi there,

Thank you for the donation,

I would start by having the engine mounts checked for any wear, have them backed off and go for a drive, with them a bit loose they may re settle, then do them up, some times if a mount has been touched, the engine may be under a bit of tension and the one mount is always loaded up, this will help realign all mounts and can often eliminate any small vibration like this, start here.

Mark (mhpautos)
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Saturday, July 31st, 2010 AT 7:07 PM
Tiny
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Hi, thanks for ur reply. I ve been to garage asking them to check the Engine mounts. They sadi Audi A4 B7 engine mouts are Electro-Hydraulic ones and the mounts themselves seem fine. Do I still need to ask them to adjust the mounts and re-settle? Thanks
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Sunday, August 1st, 2010 AT 2:51 AM
Tiny
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Not a dedicated Audi tech, but I will look into it, I do feel that it may be a mount issue, I will re post when I find something out,

mark (mhpautos)
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Sunday, August 1st, 2010 AT 2:55 AM
Tiny
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Hi there,

reading a few sites on the web, there are a few talking about having a similar problem, the consensus is inner CV joints setting up a bit of a vibration, this will have to be check by a mechanic, worth a try, nothing on the engine mounts so don't go that way.

Mark (mhpautos)
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Sunday, August 1st, 2010 AT 3:20 AM
Tiny
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Thanks Mark. The thing is if it is the inner CV joint problem, it can only got the vibrations when the car is running. For my case, I can feel the vibrations from the pedals even the car in idle. That is strange. Isnt it?
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Sunday, August 1st, 2010 AT 3:23 AM
Tiny
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Hi there,

OK, so back to an engine vibration, this can be either a minor miss fire, engine mounts(again) or an engine balance problem, these will have to be investigated by a mechanic, I wonder why the dealer is not interested, may be a letter of complaint to Audi customer relations will kick them into gear.

Mark (mhpautos)
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Sunday, August 1st, 2010 AT 5:43 AM
Tiny
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Right, the dealer has done the VAG diagnostic check. I ve been told the injectors and EGR valve ect working fine. If there would be a chance of minor miss fire, it is possible can be checked out by last time diagnostic? I would go to the independent speciallist to check the engine mount again. Btw, how to investigate the engine banlance? Any possible that alternator pully or drive belt making that kind of vibration? I will definiately write a complain letter to the audi cunsomer relation. Hope that helps but still I fed up dealing with them. They r just ignoring the problem.
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Sunday, August 1st, 2010 AT 5:52 AM
Tiny
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HI there,

If it was a miss fire, I would expect to see a cylinder miss fire code or a random miss fire code, I do no that some later ECU's run a fuzzy logic system, that is that a code will not be set straight away, it must occur through a set number of cycles before it sets, but as you have had this for some time, that may not be what we are looking for, may be get the engine warm and remove the belts, run and see if the vibration is there at idle? Worth a try, this is a bit hard with out experiencing it first hand, may be ask a independent mechanic to write a letter just confirming that they feel this vibration, a second opinion may spur some action as well.

Mark (mhpautos)
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Sunday, August 1st, 2010 AT 6:11 AM
Tiny
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Thanks mark. I will go to check out on Monday. I will ask them to take the belt out and feel if the vibration still exist. I will keep you posted. Thanks a lot.
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Sunday, August 1st, 2010 AT 6:17 AM
Tiny
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OK, that will be good, the feed back may help someone else down the track,

mark.(Mhpautos)
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Sunday, August 1st, 2010 AT 6:30 AM
Tiny
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Friday, August 6th, 2010 AT 8:05 AM
Tiny
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You said in your first post that you felt a vibration in the brake pedal & the steering wheel, is this while driving and applying the brakes or sitting with the engine idling? I keep thinking engine mounts, but I am not familiar with these hydraulic mounts, as I said I am not an Audi tech, but logic tells me any vibration while stationary is engine vibration, engine mounts should adsorb any minor vibration, that is where I would be looking, that or some connection between engine/transmission and the body that is not vibration suppressed.

Mark (mhpautos)
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Friday, August 6th, 2010 AT 8:46 AM
Tiny
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The vibration is always presenting, I can feel that no matter I am driving or the sitting with engine idling. Other than the engine mount, is it possible the CVT transmission problem? The flywheel gearbox inpushaft is slightly worn or out of banlance? Whereelse should I have a look then. So confused! Thanks mate
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Friday, August 6th, 2010 AT 5:49 PM
Tiny
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Hi there,

Well this is starting to bug me, I don't like not finding a solution to any problem, so where to from here, we must look at what is happening an idle ( as you say the vibration is felt then) a vibration is a mass weight out of balance, so what is turning to cause this vibration? Engine, engine vibration can be a miss fire, an internal balance problem( very unlikely) but checking the valve timing is correct is an option, a problem with the torque converter, the torque converter is the engines mass balance (flywheel for a manual gearbox) so this is a possibility, see info on torque converter construction, and the engine mounts causing a problem, I can't think of any other reason to hand now, so may be the torque concerts can be investigated, unfortunately this is a transmission out look see.

Mark (mhpautos)
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Tuesday, August 10th, 2010 AT 4:07 AM
Tiny
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Sorry, i did not add the link to the last post.

mark

https://www.2carpros.com/how_does_it_work/torque_converter.htm
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Tuesday, August 10th, 2010 AT 4:10 AM
Tiny
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Hello mark, thanks for ur information. I will still ask the garage to check out the engine mounts again then. Would you think if the engine mounts are faulty, the computer will log a fault? As I can see these engine mounts are electronics ones. Btwm way any possible of the rubber bush where the pedal meets the bulkhead is going down, and causing the vibrations to steering wheel and pedals? Back to the Torque Converter, is there an Torque Converter for CVT transmission? I know there is no flywheel for CVT transmission. Where is it located? Thanks mate.
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Tuesday, August 10th, 2010 AT 5:52 AM
Tiny
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Hello mark, I been to garage today. They found out a problem but not sure if it is this problem causing the vibration. Right, they found out the cambelt bearing is degreasing, and making noise, it is leaking a bit. The cambelt is due to change in 2000 miles. Do you think that is the problem causing the vibrations?

Thanks
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Sunday, August 15th, 2010 AT 6:11 PM
Tiny
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I feel that it would have to be fairly bad for it to be felt as a vibration, but it should be replaced and do the timing belt as well, I suppose you will have to see how this affects the problem, I spoke to a mate who was a tech at Audi Australia, he suggested to see if a body shop can do a body vibration test with a set of chassis ears, apparently these are a very sensitive listening device that can help pin point vibration issues, now this is something I have never heard about so you can only ask and see.

Mark (mhpautos)
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Sunday, August 15th, 2010 AT 8:00 PM

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