Last time and the only time I've ever had one do this, it was due to cat lightoff. Due to the 10% lean on the wideband and the - torque at idle, I'm...
Helping a friend on his 70 c10 L83 swop. It has a BTR stage 2 truck cam with 4 deg limiter. Using a PSI wire harness. Engine, ecu, and peddle out of...