I just put a t04e turbo on my 1.8t a4 and a code just popped up P1136 Lean condition. Now I didnt replace the injectors ( stock inj ) or any fuel items but im going to . I just want to know if anyone else has gone threw this problem and how they fixed it.I was thinking of tuning it with a wideband O2 to stop running lean but im not sure if you can do that to an audi .Also anyone know the duty cycle of the Stock injectors on a 1.8t motor.

 

maybe ur small injectors cant supply fuel fast enough
u need bigger injectors

 

but the maxs duty cycle hasnt been reached yet .also I have low boost 5psi .