1996 Chevy C1500 5.7L Code P1351

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Aug 31, 2019
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Location
Stanton, CA
#1
Make
Chevrolet
Model
C1500
Year
1996
Miles
168,000
Engine
5.7L Vortec V8.
I've got a 1996 Chevy pickup with the Vortec 350 that won't start. It cranks, hesitates, then cranks again but won't fire up. It's getting fuel to the throttle body and it backfired when starter fluid was used. It seems to be getting fuel and spark.

I scanned it and the only code it comes up with is P1351. "Ignition control circuit voltage high/Ignition control circuit open."

Prior to this issues, it seemed to be hesitating before it would start. It would crank, pause, and then fire up. Once started, it was running great. Any thoughts?

Thanks in advance!
 
Joined
Mar 1, 2002
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Kentucky
#2
Study this cap carefully. If the power (spark) from the coil jumps through a crack, it will go to one of two most likely spark plugs. If you disconnect the wires at those two spark plugs, the spark will not be able to reach the spark plug and that will "fix the problem".

1567281552113.png
Looks like it's gonna be #6 or #3.
1567282235328.png
 

billr

wrench
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Mar 12, 2007
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#3
I'm thinking the problem might be in an entirely different area, the signal from the PCM that controls the spark coil driver (ICM). Disconnect the cable to the ICM and inspect the contacts for corrosion. Even if you see nothing wrong, just the "wiping" of the contacts from R&R of that connector may heal it.