Hi all

My VRS SE has a strange habbit......when I stop at light or a junction, the car bounces or resonates at a low frequency. The whole car 'thuds' and its very nausiating. The tachometer does not seem to fluctuate and it doesnt happen all the time.

Anyone had the same problem/know were I should start looking?

Cheers

Edited 1 August, 201213 yr by SE#075

Does it do this at a specific rev range when idling? What does it rev at when idling? Mine was diagnosed as having a sticky throttle pedal. Think that's the reason why it sometimes revs at over 1500 revs when it's just idling. I solve it by sticking my foot behind the pedal and lifting it up. The revs then drop to about 1000.

Either that or it's just a characteristic of the PD engine. It can be quite agricultural next to a modern CR engine.

Should be idling around 800-900 rpm.

Does it go away with the clutch pressed?

Phil

Check your timing with VAG COM. Mine had a terrible lumpiness on idle until I realised the timing was massively advanced. Timing can slip as the cambelt ages. A simple adjustment of the camshaft sprocket may be your solution.

heck out http://www.myturbodiesel.com/1000q/multi/PD-adjust-Idle-TDI.htm

Edited 2 August, 201213 yr by piggoy

Thanks for the comments.

The car does not seem to idle slow or fast, nor is it erratic its pretty stable at 800rpm. I have looked at the link regarding the timing which may be an issue as I notice the fuel economy is not what I expect, I drive it responsibly yet only seem to get 400 miles from a tank, and thats at least 300 miles on motorways.

I have also noticed I get a large plume of grey/white smoke on start up...so wonder if this is related?

Cheers

The small puff of smoke on start up is normal, not huge choking plumes lol. I would seriously have your timing checked, it's very simple if you have access to VAG-COM and could be the source of your problem. Also worth checking is your cambelt tensioner which is visible from the top cambelt cover. Mine has de-tensioned itself or was not tensioned correctly by the mechanic who installed it and that was the reason for my timing being massively advanced. Since re-timing the engine it runs like an absolute dream, no more lumpy idle and much improved fuel economy.

See my post - http://www.briskoda.net/forums/topic/240526-help-serious-timing-belt-issue-broken-tensioner/

Edited 7 August, 201213 yr by piggoy

I dont have access to VAGCOM.....would it be a case of taking it to a dealer or are these available on eBay etc?

Thinking it may be the timing.....fuel econ is not great to be honest.

Cheers