I have a 99 grand marquis. It ran a little rough, I thought it was missing a cylinder. Upon swapping coils i discovered one was bad and i replaced it. Now the car claims two are misfiring. Electrical?

Asked by Oct 24, 2014 at 11:48 AM about the 1999 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

The bad coil was at cylinder 5 and now 1
and 8 have misfire error codes. I can
replace them all with spark plugs for 80 but
i have a sinking feeling this wont solve the
problem.

I just purchased this car for dirt cheap
knowing i could part it out and get my
money back if need be but id like to repair it
if i can come out ahead.

1 Answer

16,600

Do a complete tune up. ALL plugs and wires, fuel filter, PCV valve and then you will know if it's a coil pack or not.

Your Answer

Add photo

Related Questions

  • Why does by 1999 Grand marquis not start sometimes? 11 answers

    It has happened to me twice now, after driving in town going shopping at at a few places. Each time I had it towed to the dealer and they couldnot find anything wrong with it. It would start every t...

    1999 Mercury Grand Marquis 4 Dr LS Sedan

    -

    Maintenance & Repair

  • where is the lighting control module located on a 2003 mercury grand marquise and how to change? 13 answers

    2003 Mercury Grand Marquis

    -

    Maintenance & Repair

  • What is going on with my marquis? 6 answers

    Hi, I was driving to Houston this weekend and experienced as series of problems that left me confused and scared. Here's what happened: as I was driving, all of a sudden the car would not go above 4...

    2001 Mercury Grand Marquis

    -

    Maintenance & Repair

  • New battery goes dead over night 19 answers

    2010 mercury grand marquis. New battery goes dead over night. Trunk light is off, glove compartment light is off, vanity lights in visors are off. AC compressor is not engaged when vehicle is not runn...

    2010 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • Does this seem like a warped intake manifold? 59 answers

    One day after getting on the highway, my car began repeatedly misfiring and slowly losing power. After about 10 miles, it was running like total shit. Ended up changing the coil pack. Noticed one o...

    2003 Mercury Sable LS

    -

    Maintenance & Repair

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 4,900
#2 kbro
kbro
Reputation 1,970
#3 Js08016
Js08016
Reputation 1,490
View All

Related Models For Sale

Used Ford Crown Victoria
6 Great Deals out of 1,501 listings starting at $2,900
Used Lincoln Town Car
39 Great Deals out of 2,160 listings starting at $1,700
Used Chevrolet Impala
917 Great Deals out of 36,376 listings starting at $1,800
Used Chevrolet Tahoe
1,063 Great Deals out of 32,232 listings starting at $1,495
Used Ford Mustang
724 Great Deals out of 38,317 listings starting at $1,750
Used Ford F-150
3,374 Great Deals out of 203,978 listings starting at $1,273
Used Ford Taurus
350 Great Deals out of 22,304 listings starting at $1,499
Used Chevrolet Silverado 1500
2,598 Great Deals out of 149,089 listings starting at $1,800
Used Buick LeSabre
7 Great Deals out of 2,349 listings starting at $1,768
Used Cadillac DeVille
1,974 listings starting at $1,600

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
3 Great Deals out of 41 listings starting at $7,617
2010 Mercury Grand Marquis For Sale
100 listings starting at $2,999
2009 Mercury Grand Marquis For Sale
5 Great Deals out of 115 listings starting at $3,495
2008 Mercury Grand Marquis For Sale
8 Great Deals out of 175 listings starting at $2,900
2007 Mercury Grand Marquis For Sale
11 Great Deals out of 172 listings starting at $1,500