Cranks does not start, no spark

289,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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PAUL LABORDE
  • MEMBER
  • 1 POST
My truck is a step side. It turns over but does not start. I was told it was the ECM. How can I know for sure?
Sep 15, 2018 at 4:38 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good afternoon.

Did you verify it has no spark?

When you crank it over, does the tachometer move up a little?

Did you check fuel pressure?

ECM is very premature and a very expensive guess. Especially if it is the wrong guess.

Roy

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

https://www.2carpros.com/articles/how-to-test-an-ignition-system
Sep 2, 2020 at 10:46 AM
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