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Intermittent engine cranks but does not start?

Tiny
CRISSYKNNY
  • MEMBER
  • 1999 MERCURY GRAND MARQUIS
  • 2WD
  • AUTOMATIC
  • 153,000 MILES
Last week my car decided not to start. It turns over strong just won’t start. First, we replaced the fuel pump, which didn’t work! Second, we replaced the relay switch, which works great for a day but once in a while it won’t start! What am I missing?
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Saturday, November 25th, 2023 AT 1:46 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,200 POSTS
Hi,

Which relay switch was replaced? Was it for the fuel pump? Also, if it is presently not starting, check to see if there is an ignition spark to the plugs.

Here is a link that explains how to do it:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Let me know what you find.

Joe
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Saturday, November 25th, 2023 AT 10:02 PM

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