Question about 1989 Mercury Grand Marquis

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How would I test fuel pump I changed fuel filter 89 grand Marquis

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    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

SOURCE: fuel pump relay location on a 1990 mercury grand marquis.

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

  • 101 Answers

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? "

  • 126 Answers

SOURCE: how can i change fuel filter in my grand marquis

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

Ford007
  • 131 Answers

SOURCE: My 2001 Mercury Grand Marquis LS has this jerking

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"

emissionwiz
  • 75066 Answers

SOURCE: firing order for 89 grand marquis and were to

there are two engine avail in this year, a 5.0 and a 5.8, the 5.0 is the most common so here is the info on that.


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Posted on Jun 04, 2010

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1 Answer

2003 Grand Marquis won't start


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