1998 mercury marquis check engine light came on and started running rough like bad gas expecially when accelerating all lights are ok runs good on the highway can you help ?

Asked by Feb 26, 2015 at 04:30 PM about the 1998 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

5 Answers

6,955

Without scanning it, it's possible the fuel pump is starting to go

330

Like the previous guy said you need run a scan of the computer to determine why check engine light is on it could be numerous things the scan of the computer narrows it down considerably

1,165

Scan, replace fuel pump relay, just because they go bad. It would show in scan.

6,955

I've worked on crown vic police cars for years and have had a few lose some pressure before total failure which created a rough idle and poor acceleration and it didn't always trip the engine light but it was rare, also check the age of the fuel filter.

1 out of 1 people think this is helpful.

Thanks guys! I just did want to show up at the shop and have somebody tell me I needed a new engine because I don't know much about cars My Marquis has been a great car and I have had minimal troubles over the years (15) Hate to think about replacing my car!!!

Your Answer

Add photo

Related Questions

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 2,105 nationwide Grand Marquis listings starting at $1,985.

ZIP:

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 5,030
#2 kbro
kbro
Reputation 2,030
#3 Js08016
Js08016
Reputation 1,580
View All

Related Models For Sale

Used Ford Crown Victoria
3 Great Deals out of 1,385 listings starting at $1,700
Used Lincoln Town Car
38 Great Deals out of 2,080 listings starting at $1,995
Used Ford F-150
3,009 Great Deals out of 207,372 listings starting at $1,200
Used Cadillac DeVille
3 Great Deals out of 1,909 listings starting at $1,600
Used Chevrolet Tahoe
868 Great Deals out of 27,794 listings starting at $1,700
Used Honda Accord
963 Great Deals out of 74,534 listings starting at $899
Used Buick LeSabre
9 Great Deals out of 2,226 listings starting at $1,299
Used Toyota Camry
1,166 Great Deals out of 95,447 listings starting at $1,250
Used Chevrolet Camaro
434 Great Deals out of 40,550 listings starting at $3,500

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
44 listings starting at $7,500
2010 Mercury Grand Marquis For Sale
5 Great Deals out of 123 listings starting at $4,500
2009 Mercury Grand Marquis For Sale
4 Great Deals out of 101 listings starting at $2,995
2008 Mercury Grand Marquis For Sale
4 Great Deals out of 153 listings starting at $2,995
2007 Mercury Grand Marquis For Sale
8 Great Deals out of 160 listings starting at $1,985