on November 21, 2012, 3:23 pm, in reply to "Re: Audi A4 TDI170 - lazy boost, black smoke"
We stripped the EGR and complete manifold assembly including ASV, found EGR sealing ring had dislodged itself causing EGR not to seat, cleaned all parts and refitted, problem solved.
However, Mark if you could go through what you were able to identify from just the airflow against boost pressure, and the theory behind it, im sure it will prove very useful.
I can see that there was clearly an aiflow issue below 2500rpm, but i dont understand your comment regarding MAF and Boost dont tally. Much appriciated
Below is graphed data after cleaning.
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Audi A4 TDi 170 BRD 2006 - Lazy boost, black smoke - Fixed # - Craig Shiraz November 19, 2012, 4:27 pm
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