99 GMC Suburban 7.4L code p1345

Question

Ive done left bank o2 sensors fuel pump. filter, cap, rotor, spark plugs and wires, timing set, it started by a p0300 code and lean code then started back firing.

Answer 1

HI there,

This code is for the crank position sensor. The crank sensor could be failing or the distributor off a bit and causing the problem. There could be a mechanical timing issue as well.