Not getting a consistent spark out of the coil?

1975 FORD F-350
200,000 MILES • 7.3L • V8 • 2WD • AUTOMATIC
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HARRY CLARK
  • MEMBER
  • 1 POST
I'm not getting consistent spark out of my coil when I first turn the key on it sparks and when I turn the key off it sparks but no spark when revving. Sometimes the engine will fire right off no problem be running fine then all of a sudden quit running. I've replaced all switches and coil electron control box, no go.
Mar 21, 2023 at 11:14 AM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,189 POSTS
It is common for the ignition module and ignition coil to go out on these trucks. I would replace them both to fix the problem.

Mar 21, 2023 at 1:03 PM
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