Scubasteve67c
Newbie
Please! Please! I have a 96 C1500 auto with a swapped L29 7.4l engine. It had a L31 prior. I have read multiple threads and scoured the web to no avail. I cannot get this thing to start. Here is what is going on:
Turns over (cranks) over just fine
ICM has 12v power, ground and ECM signal
Have tach signal via scanner
55psi cranking at service port
Harber freight spark checker lights up from coil when cranking
Adjustable spark check shows weak spark out of coil - won't jump much of a gap. Nothing ever out of distributor to plugs.
Swapped out coil, ICM, crank sensor, new distributor, wires and plugs. Also swapped out the ECM. No change.
Shows no codes when cranking
Rotor turns when cranking as well.
Has oil pressure when cranking.
Help!
Turns over (cranks) over just fine
ICM has 12v power, ground and ECM signal
Have tach signal via scanner
55psi cranking at service port
Harber freight spark checker lights up from coil when cranking
Adjustable spark check shows weak spark out of coil - won't jump much of a gap. Nothing ever out of distributor to plugs.
Swapped out coil, ICM, crank sensor, new distributor, wires and plugs. Also swapped out the ECM. No change.
Shows no codes when cranking
Rotor turns when cranking as well.
Has oil pressure when cranking.
Help!