Engine cranks but will not start

Tiny
TERRY$
  • MEMBER
  • 2005 CADILLAC STS
  • V8
  • 2WD
  • AUTOMATIC
  • 99,000 MILES
Any info will help. Thank you
Thursday, February 10th, 2022 AT 4:54 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi,

To narrow things down, have you checked to see if there is spark and fuel to the engine? If not, that is where I need to start.

First, see if the engine will start using starting fluid. If it does and then stalls, we will know it is a fuel-related issue. If there is no change, it is likely ignition related. Here is a link that explains how to check for ignition spark:

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

Additionally, here is a link that reviews the most common causes of a crank no start condition. Take a look through it to see if it 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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Thursday, February 10th, 2022 AT 7:41 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

You need a spark, fuel pressure, and compression for the engine to run.

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

I would rent a tester at a parts store and test the actual pressure to be sure the pump is working correctly.

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

I would also check for spark. A guide is below for you to follow:

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

Lastly, I would check the compression to be sure the timing is correct for it to run.

https://www.2carpros.com/articles/how-to-test-engine-compression

Let me know the results so we can proceed.

Roy
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Friday, February 11th, 2022 AT 3:10 AM

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