P0351 Chevrolet -

Question

i got the code po351 the truck seems to be running fine i changed the coil and moved the spark plug wires around and im still getting the code unsure what to do next i also used a 90 degree in line ignition spark checker and that checked out to be fine as well

Answer 1

P0351 Ignition coil A Primary / Secondary circuit malfunction

Measure the pink wire this would be the ignition 1 voltage, you should measure battery voltage, if that is good check the ground that is at the left side of the engine under the exhaust manifold making sure it is properly grounded