Just another P0171
My Celica shows the DTC: P0171 System Too Lean (Bank 1).
What i've done so far:
Replaced MAF by Denso DMA-0108
Replaced both heated O2 sensors, by Denso DOX-0273 and DOX-0274
Replaced fuel pump by Denso DFP-0103 and toyota spare part fuel filter and o'rings.
Replaced intake manifold gasket by toyota spare part
The light only turns on, when the car is idle, the car runs normal.
Short fuel trim shows 25%, several ECU resets, no leaks on vacuum line i did smoke tests etc...
Any suggestion? Or should i give up...