"cough"

5

Asked by Feb 05, 2011 at 10:26 PM about the 2002 Mercury Grand Marquis LS Premium

Question type: Maintenance & Repair

A new MGM owner and loving it! I notice at 50 - 60 mph and "lugging" a little going up a slight grade the motor will "cough". New fuel filter, new plugs, coil packs "look" ok.  any ideas?

2 Answers

3,695

You could be using gasoline that doesn't have a high enough octane rating. High-compression engines need higher-octane fuel to avoid detonation and pre-ignition problems.

1 of 1 people found this helpful.

run a can of sea fome fuel injector cleaner in a full tank of gas,is the best stuff on the market,it could be a cloged injector from this crappy stuff they call gas today.if you can afford it put in 93 oct with the cleaner.

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

  • "cough" 2 answers

    A new MGM owner and loving it! I notice at 50 - 60 mph and "lugging" a little going up a slight grade the motor will "cough". New fuel filter, new plugs, coil packs "look" ok. any ideas?

    2002 Mercury Grand Marquis LS Premium

    -

    Maintenance & Repair

  • 2000 Mercury Grand Marquis dash lights not on and car won't start

    2000 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • Runs great when it starts but now starter will not engage

    I have a 2004 Grand Marquis I do not have a owner's manual for it so when my cigarette lighter went out we pulled each fuse and put back in but when we went to start it it won't even crank now lig...

    2004 Mercury Grand Marquis

    -

    Maintenance & Repair

  • FUEL PUMP REPLACEMENT 3 answers

    MY WIRING CONNECTOR ON THE FUEL HAD DISINTEGRATED. THE REPLACMENT CONNECTOR CAME WITH 4-BLACK WIRES, WHERE THE ORIGINAL HAD 2-BLACK, 1-YELLOW, AND 1-RED. IT FELL OFF AND I DONOT KNOW THE ORDER TO SPL...

    1992 Mercury Grand Marquis

    -

    Maintenance & Repair

  • Do the keys have a chip in them 8 answers

    2000 Mercury Grand Marquis GS

    -

    Maintenance & Repair

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,650
#2 kbro
kbro
Reputation 2,120
#3 Js08016
Js08016
Reputation 1,830
View All

Related Models For Sale

Used Ford Crown Victoria
13 Great Deals out of 1,255 listings starting at $1,995
Used Lincoln Town Car
40 Great Deals out of 1,804 listings starting at $1,495
Used Chevrolet Impala
546 Great Deals out of 35,508 listings starting at $899
Used Cadillac DeVille
1,735 listings starting at $1,995
Used Buick LeSabre
19 Great Deals out of 1,927 listings starting at $1,588
Used Ford F-150
2,091 Great Deals out of 192,324 listings starting at $290
Used Ford Mustang
680 Great Deals out of 44,480 listings starting at $1,500
Used Ford Taurus
282 Great Deals out of 18,748 listings starting at $1,499
Used Honda Accord
1,053 Great Deals out of 66,933 listings starting at $1,000
Used Mercury Marauder
27 listings starting at $2,690
Used Toyota Camry
1,225 Great Deals out of 82,703 listings starting at $750
Used Ford Explorer
913 Great Deals out of 63,684 listings starting at $799

Used Cars For Sale

2007 Mercury Grand Marquis LS Premium For Sale
6 Great Deals out of 102 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.