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the vnt turbo on these can coke up, its fairly easy to remove and de coke it and taking hot side apart to clean doesnt affect balance so its worth trying mine was sluggish untill i cleaned it now goes like a rocket mine didnt have any fault codes logged either with temp sounds more like...

b5 or b6 model? probably have more luck posting in model forum rather than diesel forum, but i would check for water in battery compartment as drainage holes can get blocked and it can flood into passenger compartment and get into conveniance modules located under carpet, or on earlier b5 models...

removed and stripped my turbo today to investigate a lack of power problem (99 a4 afb 2.5 tdi, garrett vnt20) ive given it a good good clean and vnt internals work perfectly now but my question is how far should i be able to move vacuum actuator rod? ive attached a hose and sucked as hard as...

trying to figure out an intermittant starting problem and poor performance on my 2.5 tdi and came accross this it seems to be a vacuum operated choke between intercooler and inlet manifold, vacuum pipe connects to something under power steering resevoir cover, replaced vacuum hose as it had a...

silicons excellent write up!, just bought new breather to fit this weekend but already got nasty oil leak (i think my engine breathes through several blown seals) did fitting help with your leak, or was it too late