Intermittent engine cranks but does not start?

1999 MERCURY GRAND MARQUIS
153,000 MILES • 2WD • AUTOMATIC
Avatar
CRISSYKNNY
  • MEMBER
  • 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
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
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
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.