"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

3,615

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

  • MY CAR IS RUNNING ROUGH FROM TIME TO TIME. 20 answers

    About a month ago my 1998 Mercury Grand Marquis started running rough after I pumped regular gas at a Chevron Station. As the car has 67,000 miles I took it to Sears Auto Center to have the spark plug...

    1998 Mercury Grand Marquis 4 Dr GS Sedan

    -

    Maintenance & Repair

  • can u remove the cadalitic converter and the car run ok 4 answers

    Mercury Grand Marquis

    -

    Maintenance & Repair

  • Engine trouble 5 answers

    I've been having intermittent trouble with my car starting and running. It is a 99 Grand Marquis and has around 80000 miles on it. It won't start half the time but will turn over and there is power...

    1999 Mercury Grand Marquis 4 Dr GS Sedan

    -

    Maintenance & Repair

  • 2000 sable dies when idle 2 answers

    Hello all, I have a 2000 mercury sable LS, with 78k miles. Vehicle has been really good to me. About 6 months ago I noticed the vehicle was having an issue while idling. At first it was not to b...

    2000 Mercury Sable LS Premium

    -

    Maintenance & Repair

  • What are the colors for the 1994 Mercury Sable wagons? 3 answers

    My father has a mercury sable GS wagon in fair (cough cough) shape. It looks beige-ish and has red stripes

    1994 Mercury Sable 4 Dr GS Wagon

    -

    General

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,460
#2 kbro
kbro
Reputation 2,060
#3 Js08016
Js08016
Reputation 1,740
View All

Related Models For Sale

Used Ford Crown Victoria
11 Great Deals out of 1,069 listings starting at $2,995
Used Lincoln Town Car
33 Great Deals out of 1,820 listings starting at $1,750
Used Chevrolet Impala
520 Great Deals out of 31,726 listings starting at $1,450
Used Mercury Marauder
25 listings starting at $7,300
Used Ford Mustang
474 Great Deals out of 45,735 listings starting at $1,999
Used Ford Taurus
249 Great Deals out of 20,434 listings starting at $699
Used Ford F-150
2,191 Great Deals out of 206,316 listings starting at $1,499
Used Chevrolet Tahoe
548 Great Deals out of 29,234 listings starting at $1,699
Used Cadillac DeVille
7 Great Deals out of 1,640 listings starting at $1,999
Used Chevrolet Camaro
226 Great Deals out of 30,943 listings starting at $1,217
Used Chevrolet Silverado 1500
1,718 Great Deals out of 175,749 listings starting at $1,250

Used Cars For Sale

2007 Mercury Grand Marquis LS Premium For Sale
3 Great Deals out of 97 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.