Hi, I recently owned an Audi S3. It's 2000, APY engine (with esp).
It seems a bit slow and maf readings are a bit low. (10-15 grams for the whole rpm range)
Depends on logs, there is no boost leak. Requested and actual boost seems closer.
On vagcom channel #32, trims are about %1-2.
I tried to find a vacuum leak with carb cleaner, but i couldn't. I think there is no leak.
It's not mapped and It's completely stock except for supersprint catback exhaust.
There is no fault on vagcom.
What should I do?
Can it be collapsing turbo inlet pipe?
I have bought a brand new K04-022 with new exhaust manifold.
I have bought a brand new MAF. (And tried another MAF, nothing changed.)
I fitted a Leon Cupra R (BAM) fuel pump to try, but nothing changed again.