2004 Mercury Gand Marquis will not start

20

Asked by Mar 19, 2014 at 08:26 PM about the 2004 Mercury Grand Marquis

Question type: Maintenance & Repair

Searched for: My neighbor has a 2004 Mercury Marquis that has and intermittant starting problem. It will operate fine for 3 or 4 weeks, then you go to start it and it will not start. It turns over fine. Battery is good. I tried battery disconnect cycle thinking it might reset the computer logic, key on and off several times, and checked fuses. One time it started right up after that. The next time no help. It was towed to a mechanic and when he got in it, it started. He did a diagnostic on it and determined it was a crank position sensor issue and replaced it. But, 3 weeks later it  happend again. I have heard that some makes of cars need to clear old timming circuit faults in the computer to function properly. Is there a manual way that I can try that with this car or do you know anything elase I can try. I think there is a maintenance bulletin out for starting problems on this car, but no recall to fix it.  Note:  I got it started this last time by removing the cam sensor and crank sensor and reinstalling it along with a battery disconnect reset.  it worked, but 3 days later, it would not start again. Now that doesn't work either.  Thanks!

4 Answers

24,565

Try this the next time it won't start: Either hook up a fuel pressure gauge or reach under and bang on the fuel tank. Your concern is most likely not an electronic concern - these things are practically bullet-proof computer-wise, but the Fuel Pump is a common intermittent failure that will only get worse over time. If you don't have a scan tool that will allow you to watch PIDs, you'll be throwing parts (and money) at it until the cows come home - or you go broke. No such thing as clearing old timing faults or anything like that. If there's a DTC - the Check Engine Light will come on. I've seen it lots and lots of times in our fleet. Dies on the officer or won't restart - gets towed in, runs fine, gets towed in again, finally, someone checks the fuel pressure and the actual voltage and pressure PIDs (or bangs on the fuel tank with a rubber mallet) and the darned thing starts. I'm willing to bet an entire Nickel that your Fuel Pump is failing!

3 of 3 people found this helpful.
Best Answer
20

You were right on! did not have the test equipment to check fuel pressures, but Tried the rubber mallet trick on the gas tank and got it started once more. As you thought, the fuel pump finally gave up and my neighbor had it towed to the Ford place where they confirmed the fuel pump was bad and replaced it. Thanks for your help!

2 of 2 people found this helpful.
24,565

You are very welcome!

20

Please answer my question

2 of 2 people found this helpful.

Your Answer

Add photo

Related Questions

  • 2004 Mercury Gand Marquis will not start 4 answers

    Searched for: My neighbor has a 2004 Mercury Marquis that has and intermittant starting problem. It will operate fine for 3 or 4 weeks, then you go to start it and it will not start. It turns over fin...

    2004 Mercury Grand Marquis

    -

    Maintenance & Repair

  • My 2004 Mercury Grand Marquis will not start 1 answer

    During the spring, summer and fall there is no problem with starting my vehicle. However, near the latter part of fall and winter my car will not start . I would have to keep turning the key until...

    2004 Mercury Grand Marquis LS Premium

    -

    Maintenance & Repair

  • my 1999 grand marquis will not start 3 answers

    cranks but will not start

    1999 Mercury Grand Marquis 4 Dr LS Sedan

    -

    Maintenance & Repair

  • 2004 mercury grand marquis 2 answers

    When I try to start my car all I'm getting is like a click click sound it won't do anything after. What is the problem?

    2004 Mercury Grand Marquis LS Ultimate

    -

    Maintenance & Repair

  • 2004 Mercury Grand Marquis 3 answers

    The air blower will not trun off when the "OFF", button is pushed. Previously the blend door actuator, I was told is the problem. The car hvac was blowing hot air on ac mode. I was told to discon...

    2004 Mercury Grand Marquis

    -

    Maintenance & Repair

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 1,835 nationwide Grand Marquis listings starting at $2,000.

ZIP:

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,520
#2 kbro
kbro
Reputation 2,080
#3 Js08016
Js08016
Reputation 1,790
View All

Related Models For Sale

Used Ford Crown Victoria
16 Great Deals out of 1,221 listings starting at $1,595
Used Lincoln Town Car
34 Great Deals out of 1,791 listings starting at $1,500
Used Chevrolet Impala
591 Great Deals out of 34,068 listings starting at $899
Used Ford F-150
2,055 Great Deals out of 207,336 listings starting at $1,499
Used Mercury Marauder
22 listings starting at $9,300
Used Chrysler 300
402 Great Deals out of 19,199 listings starting at $850
Used Honda Accord
948 Great Deals out of 77,757 listings starting at $899
Used Ford Taurus
269 Great Deals out of 20,573 listings starting at $1,995
Used Cadillac DeVille
4 Great Deals out of 1,627 listings starting at $1,988
Used Buick LeSabre
19 Great Deals out of 1,920 listings starting at $1,000
Used Chevrolet Tahoe
559 Great Deals out of 31,371 listings starting at $1,500
Used Ford Mustang
541 Great Deals out of 45,846 listings starting at $1,999

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
33 listings starting at $4,495
2010 Mercury Grand Marquis For Sale
88 listings starting at $3,150
2009 Mercury Grand Marquis For Sale
6 Great Deals out of 83 listings starting at $3,599
2008 Mercury Grand Marquis For Sale
11 Great Deals out of 138 listings starting at $2,250
2007 Mercury Grand Marquis For Sale
8 Great Deals out of 132 listings starting at $2,495

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.