2000 grand marqui runs good cold /rough after warms up

Asked by Jul 01, 2014 at 08:45 PM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

my car runs rough and acts like its missing it wont do over 30mph or climb a hill,i replaced spark plugs mass air sensor fuel filter and 4 o2 sensors.my car only has 56000 miles on it and im the second owner ,the codes still say running lean bank1 sensor2,bank2 sensor2 this is my only way to get around and I live in bfe......someone plz help

2 Answers

25,565

Likely it's the MAF but without watching the actual readings coming from the engine sensors, it's only a guess. There's more to it than just reading codes.

2 of 2 people found this helpful.

ty tracy like I said it has a new maf I am trying to find someone with a cpu ,its just odd it runs great cold after an hour or so it starts running ruff im also going to check the fuel pressure

Your Answer

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,730
  • #2
    kbro
    Reputation
    2,130
  • #3
    Js08016
    Reputation
    1,870
View All

Related Models For Sale

Used Ford Crown Victoria
5 Great Deals out of 1,185 listings starting at $2,900
Used Lincoln Town Car
35 Great Deals out of 1,743 listings starting at $1,500
Used Chevrolet Impala
504 Great Deals out of 33,648 listings starting at $950
Used Ford F-150
2,277 Great Deals out of 181,621 listings starting at $1,000
Used Ford Mustang
717 Great Deals out of 38,357 listings starting at $895
Used Honda Accord
1,044 Great Deals out of 60,748 listings starting at $999
Used Chevrolet Tahoe
668 Great Deals out of 39,348 listings starting at $1,000
Used Ford Taurus
255 Great Deals out of 16,489 listings starting at $1,850
Used Lincoln Continental
17 Great Deals out of 4,303 listings starting at $35,999
Used Cadillac DeVille
1,624 listings starting at $1,995

Used Cars For Sale

2010 Mercury Grand Marquis LS For Sale
3 Great Deals out of 90 listings starting at $3,490
2009 Mercury Grand Marquis LS For Sale
4 Great Deals out of 76 listings starting at $2,899
2008 Mercury Grand Marquis LS For Sale
5 Great Deals out of 101 listings starting at $2,995

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.