Grand Marquis cylinder 6 misfire at idle
15

Asked by Guru94FHRB Sep 23, 2020 at 03:24 PM about the 2004 Mercury Grand Marquis LS Premium

Question type: Maintenance & Repair

I've had a cylinder 6 misfire for a while. Only happens at idle and when the
vehicle has warmed up. The check engine light flashes but goes away when
I accelerate. Things I've replaced recently include:

   -All spark plugs (all wells were dry - no leaks)
   -All coil packs
   -Fuel injector on cylinder 6
   -Left valve cover gasket
   -IAC valve
   -MAF sensor
   -TPS sensor

Any ideas?

3 Answers
15

Guru94FHRB answered 3 years ago

I actually ordered the crank sensor and cam sensor and they should be here in a few days.

Mark helpful
15

Guru94FHRB answered 2 years ago

If anyone's seeing this in the future, the solution was to replace all fuel injectors. Not sure which one caused the issue, but after replacing all 8, the symptoms and CEL went away.

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • Grand Marquis cylinder 6 misfire at idle 3 Answers

    I've had a cylinder 6 misfire for a while. Only happens at idle and when the vehicle has warmed up. The check engine light flashes but goes away when I accelerate. Things I've replaced recently incl...

    2004 Mercury Grand Marquis LS Premium

    -

    Maintenance & Repair

  • 2005 Grand Marquis rattle at idle 3 Answers

    When the car is idling or running at a steady speed, there is a rattle that is coming from the engine area under the car. When I hit the accelerator, it goes away. The sound is like a stone in a met...

    2005 Mercury Grand Marquis GS

    -

    Maintenance & Repair

  • 2004 grand marquis gos to cold while at idle 1 Answer

    my marquis temp gauge drops to cold when at idle but shows normal while driving but drops back to cold when stopped at idle thanks in advance for any help

    2004 Mercury Grand Marquis GS Convenience

    -

    Maintenance & Repair

  • High Idle on a 1985 Grand Marquis 1 Answer

    So , I just bought a 1985 Grand Marquis from someone and it won't idle down. I was wondering does anyone happen to know why or has had that problem before?

    1985 Mercury Grand Marquis

    -

    Maintenance & Repair

  • Why does my grand marquis idle rough in park? 2 Answers

    Why does my my 1988 grand marquis idle rough in park but acts fine when I press the gas

    1988 Mercury Grand Marquis

    -

    Maintenance & Repair

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Mercury Grand Marquis Questions

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,700
  • #2
    Trippmeister
    Reputation
    5,040
  • #3
    Bob Beaman
    Reputation
    3,780
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Lincoln Town Car
3 listings
Used Ford Crown Victoria
3 listings starting at $8,960
Used Buick LeSabre
1 listing
Used Ford F-150
314 Great Deals out of 13,742 listings starting at $3,800
Used Chevrolet Impala
7 Great Deals out of 133 listings starting at $4,888
Used Chevrolet Tahoe
13 Great Deals out of 822 listings starting at $9,980
Used Ford Mustang
37 Great Deals out of 1,639 listings starting at $8,800
Used Lexus LS
30 listings starting at $5,995
Used Chevrolet Silverado 1500
214 Great Deals out of 8,009 listings starting at $1,500
Used Ford Taurus
5 Great Deals out of 81 listings starting at $4,990
Used Toyota Camry
46 Great Deals out of 1,149 listings starting at $2,500
Used Buick LaCrosse
5 Great Deals out of 29 listings starting at $6,995

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.