"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

3,415

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 out of 1 people think this is 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 out of 1 people think this is 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

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,060
#2 kbro
kbro
Reputation 2,040
#3 Js08016
Js08016
Reputation 1,580
View All

Related Models For Sale

Used Ford Crown Victoria
6 Great Deals out of 1,379 listings starting at $1,700
Used Lincoln Town Car
33 Great Deals out of 2,089 listings starting at $1,995
Used Chevrolet Impala
907 Great Deals out of 35,162 listings starting at $1,700
Used Ford F-150
3,001 Great Deals out of 207,338 listings starting at $1,000
Used Chevrolet Tahoe
810 Great Deals out of 27,743 listings starting at $1,700
Used Honda Accord
1,001 Great Deals out of 74,760 listings starting at $899
Used Cadillac DeVille
5 Great Deals out of 1,955 listings starting at $1,600
Used Buick LeSabre
11 Great Deals out of 2,253 listings starting at $1,299
Used Ford Mustang
534 Great Deals out of 42,627 listings starting at $1,699
Used Chevrolet Silverado 1500
2,535 Great Deals out of 151,795 listings starting at $1,500
Used Chevrolet Camaro
378 Great Deals out of 40,505 listings starting at $3,500

Used Cars For Sale

2007 Mercury Grand Marquis LS Premium For Sale
6 Great Deals out of 113 listings starting at $2,750