Hey guys

Thinking of buying a 2002 audi a4 1.8t that i recently checked out. Great deal! but it does have a few issues, hence the great deal. Wondering if anyone could point me in the right direction of diagnosing the problems before I go and buy this thing.

First off here are the mods that you would need to know about
gt3071r turbo
630cc injectors
eurodyne base file mafless tune

He has all the evap shit deleted and the car is running on a manual boost controller set to 0 so the pressure is determined by the wastegate spring 10 psi.

Anyways to the issues. The car has absolutely no power but it doesn't seem to be going into limp mode either.

The ecu is throwing the following codes
p2138 - accelerator position sensor
p0238- turbo boost sensor A circuit high input
p0106- map sensor
and the other codes are related to the emissions stuff deleted

The owner claims he has tried installing a new pedal assembly along with the map sensor and the same codes come up. So what am I looking at here. Is the Ecu shot? Perhaps the wiring harness is faulty somewhere?

I have also read that the 02 sensor/ harness could have something to do with the throttle issues don't know how true this is. Just been aimlessly browsing with no luck

Also to ad he had the maf plugged in for whatever reason. Wondering if this would affect anything because of the mafless eurodyne tune

thanks for your time and hopefully I can figure this out cause I really want this car :) Cheers!