Confused about a thumping issue still..

[MiniMental]

Hola,

I’m still having an intermittent thumping issue with my AWX. It’s intermittent. Sometimes t does it and sometimes it doesn’t.

Basically, if I leave it all day or night, about 7 times in 10 when I start it it runs on three cylinders and thumps a LOT. But I can place why. It stops doing it suddenly after about 5 mins sometimes 10 if it is really cold. It smokes a lot of grey smoke when doing it which smells like unburnt diesel... and won’t drive.

Injector loom is 12 months old
Camshaft and lifters.etc are 12mths old
Boost hoses are all fine and it works as normal once warm, but a little smoky under wot.

Seems to stop to suddenly to be a mechanical issue.

Any ideas?


54 Passat Wagon PD175
99’ Audi S4 Avant 2.7 QTO ;)