Turns over but will not start

Tiny
CHRISTOPHER LEE SIMPSON
  • MEMBER
  • 2003 MERCURY MARQUIS
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
Car turns over but will not start when cold out (2003 Lincoln town car).
Wednesday, January 20th, 2021 AT 9:24 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Chris,

Will it start using starting fluid regardless of temperature? If so, either we have a weak fuel pump or there is an issue with the engine coolant temperature sensor.

Do me a favor. Let me know if you have access to a live data scan tool. If you do, compare the ECT signal to the actual temperature. If it is okay, then check fuel pressure. Here is a link you may find helpful:

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

Let me know.

Joe
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Wednesday, January 20th, 2021 AT 8:43 PM

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