A4 1.9 tdi ESP light and misfire
I have an 03 a4 1.9 tdi with 155k miles. It has always been a great runner but recently has given a few problems until yesterday when I had to be towed home. The AA didn't know what the problem was so I thought I would ask here.
The last few months it would very occasionally judder for a couple of seconds and then be fine. I had it serviced, had all the filters replaced and they ran an engine cleaner though (although I only had a quarter of a tank of diesel and I think you are supposed to run it through for longer than that?). The problem carried on for a few seconds every few days but then yesterday got much worse. The whole car now judders heavily under idle and does not like accelerating. A few seconds after it started juddering the ESP light came on and is continuous. The engine management light has not come on at all. If I turn the engine off for a few minutes and start it again it runs fine for a few seconds then starts to judder and the ESP light comes on.
Any ideas? The AA suggested injectors or the EGR valve. I wonder if a fault in the ESP is cutting power to some cyclinders? I am going to take it to a garage but want an idea of what it could be before they suggest replacing the injectors!
Thanks for any help you can give.