2005 Mercury Grand Marquis hesitates when stopped at red light while pressing the accelerator, what is the cause?

Asked by Aug 12, 2014 at 03:25 PM about the 2005 Mercury Grand Marquis GS

Question type: General

The accelerator is slightly pressed and the car is running and it hesitates to move.

6 Answers

113,625

The TPS could have. Bad spot in it, once you get over the initial stumble does it run ok.

1 people found this helpful.

Yes it runs ok till slow down to a stop again.

113,625

If you want to track it down for sure you may have to get the computer system "live data scanned" that way you could see what the ECM sees as the sensors send their signals to the computer.

105

sounds like map sensor very common to go bad very easy to replace two screws

1 people found this helpful.

Thanks I will get that checked out and let you know if that's the problem.

Possible Manifold Absolute Pressure Sensor (MAP Switch). It will jerk at low speeds and run smooth at speeds above 45 +-. Some times it shows no problems codes when checked.

Your Answer

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 1,192 nationwide Grand Marquis listings starting at $1,200.

ZIP:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,980
  • #2
    kbro
    Reputation
    2,210
  • #3
    Js08016
    Reputation
    2,050
View All

Related Models For Sale

Used Lincoln Town Car
24 Great Deals out of 1,358 listings starting at $1,995
Used Ford Crown Victoria
710 listings starting at $1,700
Used Chevrolet Impala
397 Great Deals out of 25,595 listings starting at $799
Used Cadillac DTS
39 Great Deals out of 1,357 listings starting at $2,995
Used Ford F-150
2,344 Great Deals out of 215,477 listings starting at $1,300
Used Dodge Charger
242 Great Deals out of 32,689 listings starting at $1,800
Used Mercury Marauder
30 listings
Used Chrysler 300
313 Great Deals out of 19,328 listings starting at $1,899
Used Chevrolet Tahoe
528 Great Deals out of 36,655 listings starting at $1,375
Used Ford Mustang
270 Great Deals out of 37,082 listings starting at $2,150
Used Ford Taurus
186 Great Deals out of 15,917 listings starting at $981
Used Toyota Camry
761 Great Deals out of 70,900 listings starting at $1,200
Used Cadillac DeVille
1,272 listings starting at $1,988
Used Honda Accord
424 Great Deals out of 101,059 listings starting at $1,200

Used Cars For Sale

2008 Mercury Grand Marquis GS For Sale
24 listings starting at $3,495
2007 Mercury Grand Marquis GS For Sale
25 listings starting at $3,498

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.