Engine cranks but does not start

Tiny
CMCCANN36
  • MEMBER
  • 1995 GMC YUKON
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
SUV ran fine loss taillights and dash lights, now won't start. It will crank over but won't start.
Tuesday, February 15th, 2022 AT 5:44 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,254 POSTS
Hi,

Did the no start begin when the lights were lost? Also, if the starter engages and it won't start, in most cases, it is either a fuel or ignition-related problem. Have you checked for either?

Do me a favor. See if it will start with starting fluid. If it does and then stalls, we know it is fuel related. If there is no change, it's likely ignition related. In that case, I need you to check for spark to the plugs. Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Also, here is a link that explains the most common causes of a crank no start condition. Take a look through it and see if anything helps.

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

Let me know what you find or if you have other questions.

Take care,

Joe
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Tuesday, February 15th, 2022 AT 5:00 PM

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