Intermittent engine cranks but does not start?

1999 MERCURY GRAND MARQUIS
153,000 MILES • 2WD • AUTOMATIC
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CRISSYKNNY
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  • 1 POST
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?
Nov 25, 2023 at 1:46 PM
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JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 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
Nov 25, 2023 at 10:02 PM