Crank no start issue

Tiny
HENRY TUBBS
  • MEMBER
  • 2000 MERCURY MARQUIS
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 77,000 MILES
Car cranks will not start. No engine light, code reader shows nothing, no fuel pressure. Changed fuel pump did not help at all. Changed PCM did not help.
Saturday, November 3rd, 2018 AT 10:57 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Hello,

It sounds like you have a PCM relay that is not working. Here is a guide to help you test it and the engine wiring diagrams so you can see how the system works along with the location of the relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

Cheers, Ken

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Sunday, November 4th, 2018 AT 11:52 AM

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