Audi A3 + S3 (2003 - 2008) - 04 2.0 TDi DSG Misfire, starting problem

Honest John Back Room » Technical matters
View Threaded
Tue 2 Jun 2009 17:53
04 2.0 TDi DSG Misfire, starting problem - r99ker
Hi, I have a 04/54 Audi A3 2.0 TDi S-Line DSG, it has done 60,000 miles, always been serviced etc, about 4 months ago, Starting the vehicle became difficult, sounded different, took a while, loads of black smack, and when it would start it would shake, like a very bad mis fire, got it booked in the garage, diagnosed the fault as a Number 4 Injector, had it replaced with a brand new one, and it was good as new!

Was driving along last week and I felt something happen to the car which I could not describe, went from smooth to being more like a tractor and misfiring heavy! With the glowplug light on the dash flashing, which then went out after stop and re start, on re start it felt as if it had gone back to how it was before the injector was replaced, struggled to start, black smoke, smelt like burning diesel, when it drives it jumps along at 1400-1600 revs, but hwen you get over them revs it is fine.

I have took it to a Audi Specialist who repaired the injector originally, and they cant find a fault with the diagnostic machine, so I have run it down to my local Audi dealer for diagnostic to see if they can shed any light..

Has any one any info on this or similar problems?

Any info appreciated,

Regards,

Dan
Reply | Report as offensive | Link
Tue 2 Jun 2009 22:27
04 2.0 TDi DSG Misfire, starting problem - Roly93
A guess would be that it may be the wiring loom that is immersed in oil inside the cam cover on these engines. This is a rare but not unheard of problem that causes these types of symptom. Has the dealer considered this instead of blaming the injectors ?
Reply | Report as offensive | Link

Looking for a garage you can trust? Honest John's Good Garage Guide has thousands of reader recommended garages, plus how-to guides and tips on servicing.

The Good Garage Guide

From which small car to buy at which price point to the best UK-built cars, our Top 10s have the lot. Click now for your shortlist.

Unsure of what to buy? Our Top 10s are here to help you....