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[Audi A3/S3] A3 2.0L TDi - Wobble/Shake ( 04Plate)


pricey66
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Anyone had or got problems with a wobble or shake when the car is stationary and idling ? i notice a problem at lights the engine ticks over then wobbles, then ticks over fine, then wobbles - doesnt seem to matter whether ive been driving at speed or town..so far an injector has been changed and a new ecu put on, but i still have this flippin wobble.

Anyone ?

ta

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Mines got exactly the same sympton. 2.0 tdi 2004.

After sitting idling for a minute or so, particularly noticeble when on a slight incline, there's an erratic noticible thump/shudder in the cars cabin caused by the engine shaking as if missfirning. You can see the engine shudder if you lift the bonnet and watch.

I've had my car back to the dealers three times "Newcastle Audi" who've deduced it's not a 'problem', apparently they all do it to a greater or lesser extent.

It's been expalined to me as follows:

The reason the engine shakes is because of the EGR ( Exhaust Gas Recirculation) mechanism. After the cars been idling for a time , some of the spent exhaust gas is recirculated back into the engine so that it can be reburnt. When this happens the mixture of fuel/air is altered causing the shudder.

This mechanism helps to allow the engine to meet its emission targets.

I find it fairly annoying and my passengers have asked if there's something the matter with the car!

It's a bit disappointing that Audi can't seem to get this right.

I assume lots of engines use this technique for emmision control ( comments welcome), but I don't recall experiencing the same shuddering sympton in anything I've driven?

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  • 4 years later...

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