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 Perv 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


The scan would show if it's bad

Your Answer:

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 7 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 dealers


Related Models For Sale

Used Lincoln Town Car
15 listings starting at $4,993
Used Ford F-150
109 Great Deals out of 7,944 listings starting at $871
Used Chevrolet Tahoe
8 Great Deals out of 509 listings starting at $6,495
Used Ford Mustang
29 Great Deals out of 969 listings starting at $3,995
Used Chevrolet Impala
19 Great Deals out of 474 listings starting at $1,800
Used Honda Accord
34 Great Deals out of 1,719 listings starting at $100
Used Chevrolet Silverado 1500
83 Great Deals out of 6,242 listings starting at $3,985
Used Lincoln Continental
4 Great Deals out of 35 listings starting at $33,565
Used Toyota Camry
56 Great Deals out of 2,215 listings starting at $3,333

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.