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Cranks no start Exactly that, cranks but doesn't start?

Tiny
GTCIRCUS
  • MEMBER
  • 2008 FORD F-150
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
Exactly that, cranks but doesn't start.
Friday, January 17th, 2020 AT 1:12 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

Can you hear the fuel pump run when you turn on the key?

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

You need spark, fuel pressure and compression for it to run.

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

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

I would check the fuel pressure and check for spark at a spark plug.

I attached some charts for you to follow.

Let me know the results. See if the tachometer moves up a little while cranking. That will tell me if the crank sensor is working.

Roy
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Monday, May 31st, 2021 AT 12:38 PM
Tiny
GTCIRCUS
  • MEMBER
  • 1 POST
Got it, fuel module it turns out was bad, all fixed!
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Monday, May 31st, 2021 AT 12:38 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,812 POSTS
ASEMASTER6371 is one of our best! Good to hear, please use 2CarPros anytime we are here to help.
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Monday, May 31st, 2021 AT 12:38 PM

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