Question about 1989 Mercury Grand Marquis
If your car died suddenly while driving, it is one thing, if it just didn't start one day, it is another, but given you have not given enough information, start here. Always check fuse first, this will tell you if pump is shot in most cases. Then check fuel pump relay located left fender under hood in fuse box. There are three relays as I recall, and if fuse was good, then more than likely it is relay, if I recall, two of relays are same type, so swap positions to diagnosis, you should be able to hear the fuel pump running, so get a gift wrap paper tube and put it near fuel pump location on gas tank and you should hear it easily, so this will further narrow down problem if you can't hear it run.
Good luck. FREE-PPV
Posted on Dec 12, 2016
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Posted on Jan 02, 2017
check the fuse .if the fuel pump was bad you blew the fuse . there is a inertia switch in the trunk or under the dash you could check . push the red button to reset relay should be under the hood in the fuse box check your book if you have one.
Posted on Nov 19, 2008
SOURCE: Fuel issue on 2001 Grand Marquis
most cars have an oil pressure sensor that is tied into the fuel system that will shut off fuel pump if oil pressure is low. Ford is famous for having a yellow fuel pump cut off switch that activates in a collision - you need to locate and check this 1st
Posted on Oct 18, 2009
Testimonial: "Oil pressure during cranking? This come off the sender switch? How to bypass to "test" if engine will start? "
you will need the proper Quick Disconnect tool, Look on the Frame rail for the filter, remove filter from the spring type retainer, remove the safety clips on the lines but not remove them completely, insert the disconnect tool & push into the fitting of the fuel line, push line & tool into eachother then pull filter away from line, if not done properly you will have a big problem putting the line back on
Posted on Oct 28, 2009
You have a described one of the coils going bad. You need to ru na power balance test to determine which cylinder it is so only one is replaced.
Posted on Mar 17, 2010
Testimonial: "Thank you, I will get right to it"
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