Hi tuners

This is my first remap of the 8N0906018BH ecu. Engine is standard.
The problem is that the engine doesn't perform well between 3000 and 3400 rpm. i can see in my logs that med MAF sensor reading is a little wierd, and the lambda log is making a big spike up and downwards while it shouldnt. the requested lambda is fine. what can cause this behaviour? start to think this is a hardware fault. maybe worn turbo, boost leak, maf, n75 or a slow reading lambda sensor.

The fault gets worse if i raise LDRXN at 3000-3400rpm. and totally disappears if i lower it to the standard file configuration.  the engine sounds healthy.

Cant find anything in my maps that would cause this kind of error.

what is your opinion?

cheers 

 

You are missing a ton of relevant data in your logs...

actual load, req boost, timing, wg duty

Bottom line is, your fueling is screwed probably because the out of control boost is maxing maf/load and the ecu doesn't know what to do.

ALWAYS fix boost FIRST, esp overboosting

don't wory about anything else till you got that dialed.