No spark

Asked by Nov 23, 2016 at 11:09 AM about the 1993 Chevrolet S-10

Question type: Maintenance & Repair

Coil ignition control module and pickup coil check
fine. New cap and rotor, starts sometimes and runs  
fine. Leave it overnight and get a no spark
situation. Any ideas welcome. S10 4x4 w code
vortec

1 Answer

1,745

Sounds like the crankshaft position sensor. I would scan the computer and check for a P0321 code. What happens if you have a sensor fault ,the computer doesn't know when to fire the plugs. It's located on the bottom side of the timing chain cover. Hope this helps.

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