"cough"
5

Asked by JLeonard15 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
7,385

Jonathan answered 13 years ago

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 people found this helpful.
Mark helpful

papa answered 13 years ago

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.

2 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Shortcuts

Search Mercury Grand Marquis Questions

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,710
  • #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 starting at $9,995
Used Ford Crown Victoria
3 listings starting at $4,499
Used Ford Mustang
42 Great Deals out of 1,614 listings starting at $5,999
Used Ford F-150
305 Great Deals out of 13,744 listings starting at $3,888
Used Chevrolet Impala
7 Great Deals out of 130 listings starting at $4,200
Used Buick LeSabre
2 listings
Used Toyota Camry
50 Great Deals out of 1,048 listings starting at $3,995
Used Chevrolet Silverado 1500
163 Great Deals out of 7,251 listings starting at $6,995
Used Honda Accord
38 Great Deals out of 988 listings starting at $2,995
Used Lexus LS
4 Great Deals out of 34 listings starting at $5,995
Used Lincoln Continental
14 listings starting at $21,880
Used Ford Taurus
11 Great Deals out of 83 listings starting at $4,900

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.