2007 Chevy Avalanche 5.3 vin 3.
I bought a remanufactured engine. After installing it, the truck runs, but only bank 1 (1,3,5,7) is firing.
It has power to the coil packs on bank 2 (2,4,6,8), but no spark. I put in a new cam sensor, crank sensor, and all 4 O2 sensors, but bank 2 will still not fire.
- What could be causing this?
- How do I diagnose it?