Intermittent not starting issue?

Tiny
RAYNEW50
  • MEMBER
  • 1995 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 132,434 MILES
It starts then quits or doesn't start at all. I changed fuel pump, oil pressure sensor, and MAP sensor. Any ideas as to what is causing this? Fuel pressure is good. No vacuum leaks.
Tuesday, July 11th, 2023 AT 3:22 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Hi,

When you have a crank with no start condition, either it is a fuel-related issue or ignition spark related. I realize you replaced the fuel pump, but anything is possible.

Here is what I need you to try. See if it will start if you use starting fluid. If it does and then stalls, it's fuel related. If there is no change, we need to make sure there is spark to the plugs.

Here is a link that explains how that is done:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Try this and let me know what you find. Also, let me know if you have a scan tool and if you checked the fuel pressure after the pump was replaced.

Take care,

Joe
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Tuesday, July 11th, 2023 AT 8:12 PM

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