I'm new to hp tuners and engine swaps, hoping someone can point me in the right direction. I swapped a 2002 l59 into my truck and it is not running well(ran perfect before swap), all stock including 4l60, I turned off vats and rear 02.
I seem to be having a fuel issue on bank 1, no codes lftb1 stays at 25%.
reading up right now and going to check fuel pressure. any suggestions are appreciated.
diving deeper into vcm scanner I'm pretty sure it's the 02 sensor on bank 1.