Engine crank no start issue

Tiny
WRB50
  • MEMBER
  • 2003 GMC ENVOY
  • 4.2L
  • V6
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
It cranks over fine, but will not start.
Saturday, May 7th, 2022 AT 7:51 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

Generally speaking, an engine will need spark, fuel and compression to start.
You will need to check to see if you have spark to the plugs.
You could have no sparks due to faulty ignition coil or module.
Also, can you tell if the fuel pump comes on when the key is in the on position?
An inoperative fuel pump can be due to a bad relay, wiring issue or a defective fuel pump.

Let me know a few more details of what you have been experiencing or if you have tried any specific steps.

Here is a helpful guide that covers the typical issues with crank/no start issues:

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

Let me know what you find or if you have any questions.
Thank you.
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Saturday, May 7th, 2022 AT 3:26 PM

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