After replacing the fuel pump the engine cranks but does not start?

Tiny
ANOMAR80
  • MEMBER
  • 1996 CHEVROLET LUMINA
  • 3.1L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Replaced fuel pump on the car listed above now car cranks but doesn't start. I have no fuel pressure and no spark. If I put key in ignition the headlights and dash lights turn on. It cranks but doesn't fully turn over. Please help me. I appreciate any ideas you can give me. Thank you.
Thursday, January 26th, 2023 AT 3:36 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,144 POSTS
When you turn the key to the "on" position without cranking the engine over can you hear the fuel pump come on inside the fuel tank for about 5 seconds? If not, it sounds like the crankshaft angle sensor has gone bad, when this sensor goes bad it will not leave a trouble code. here is the location of the sensor so you can check it out. This engine has one of two sensors 7x or 24x FYI.

This guide can help as well:

https://www.2carpros.com/articles/car-not-running-advanced

Check out the images (below). Please let us know what you find. We are interested to see what it is.
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Thursday, January 26th, 2023 AT 1:12 PM

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