2003, 4.6, "missing". Jerky feeling around 50 mph under light to moderate acceleration.
895

Asked by allyoop Mar 15, 2014 at 06:11 PM about the 2003 Mercury Grand Marquis GS

Question type: Maintenance & Repair

I have replaced all coils, plugs, and fuel filter. The car has never thrown a code for this
problem. Still have the problem. Any suggestions?

1 Answer
57,965

Tracy answered 10 years ago

Try turning off the Overdrive when the sensation begins. You may have a transmission component that is malfunctioning - like Overdrive gear itself or the Lock-up torque converter. A power balance test would definitely show you if the engine was indeed missing.

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 2003, 4.6, "missing". Jerky feeling around 50 mph under light to moderate acceleration. 1 Answer

    I have replaced all coils, plugs, and fuel filter. The car has never thrown a code for this problem. Still have the problem. Any suggestions?

    2003 Mercury Grand Marquis GS

    -

    Maintenance & Repair

  • chirping @ 50+mph? 1 Answer

    09 with 20K mis. bought mid July, had been in minor front end colission. repair was great. 3 weeks ago a chirp began. replaced idler brg and chirp stopped. chirp returned Sat. while doing 65-70 ...

    2009 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • Missing on exceleration 1 Answer

    My Mercury misses on acceleration but why won't the check engine light come on the engine is missing and light does not come on

    1998 Mercury Grand Marquis 4 Dr GS Sedan

    -

    Maintenance & Repair

  • 2003 Mercury Grand Marquis oil light 1 Answer

    My oil light comes on when I come to a stop

    2003 Mercury Grand Marquis LS Ultimate

    -

    Maintenance & Repair

  • Still feeling like it’s missing 1 Answer

    My car still feels like it’s missing , I changed the senors , changed oil and spark plus

    2003 Mercury Grand Marquis LS Premium

    -

    Maintenance & Repair

Shortcuts

Search Mercury Grand Marquis Questions

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,700
  • #2
    Trippmeister
    Reputation
    5,060
  • #3
    Bob Beaman
    Reputation
    3,780
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Lincoln Town Car
2 listings
Used Ford Crown Victoria
3 listings starting at $8,960
Used Buick LeSabre
1 listing
Used Ford Mustang
35 Great Deals out of 1,596 listings starting at $7,999
Used Toyota Camry
49 Great Deals out of 1,094 listings starting at $2,500
Used Ford F-150
305 Great Deals out of 13,473 listings starting at $3,888
Used Chevrolet Impala
8 Great Deals out of 130 listings starting at $3,495
Used Chevrolet Silverado 1500
167 Great Deals out of 7,420 listings starting at $6,995
Used Lexus LS
4 Great Deals out of 34 listings starting at $5,995
Used Chevrolet Corvette
26 Great Deals out of 786 listings starting at $15,900
Used Honda Accord
49 Great Deals out of 978 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. Content will be removed if CarGurus becomes aware that it violates our policies.