I have a 1999 mercury grand marquis. I changed the fuel pump and fuel filter. Change plugs and coils. When i sit in park it runs but when i get on the highway after 45 sec my temp gauge will come on

Asked by May 24, 2015 at 11:56 PM about the 1999 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

and the car cuts off. Then it cranks
back up n drives after a while. The
check engine light also fades in and
out. My car was running perfect till i
changed the pump. Please help me

4 Answers


Have a scan to see if anything comes up to start with.

Ok. And could a hear sensor maybe the problem. Cause my temp light cimes on wen.i do like 60 n shuts of

Heat sensor i meant


The scan would show if it's bad

Your Answer:

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 10 nationwide Grand Marquis listings and the tools to find you a great deal.

Postal Code:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
  • #2
  • #3
View All

Find great deals from top-rated dealersTM


Related Models For Sale

Used Lincoln Town Car
15 listings starting at $5,995
Used Ford F-150
125 Great Deals out of 14,216 listings starting at $2,000
Used Chevrolet Impala
18 Great Deals out of 807 listings starting at $2,495
Used Honda Accord
53 Great Deals out of 1,903 listings starting at $2,800
Used Chevrolet Tahoe
17 Great Deals out of 1,070 listings starting at $4,999
Used Toyota Camry
46 Great Deals out of 1,436 listings starting at $2,500
Used Ford Mustang
43 Great Deals out of 1,782 listings starting at $4,995
Used Chevrolet Camaro
35 Great Deals out of 1,112 listings starting at $9,950
Used Ford Taurus
15 Great Deals out of 373 listings starting at $4,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.