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

7,965

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

380

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

1,465

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

7,965

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 of 1 people found this 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

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 1,733 nationwide Grand Marquis listings starting at $999.

ZIP:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,830
  • #2
    kbro
    Reputation
    2,150
  • #3
    Js08016
    Reputation
    1,900
View All

Related Models For Sale

Used Lincoln Town Car
30 Great Deals out of 1,720 listings starting at $1,004
Used Ford Crown Victoria
6 Great Deals out of 884 listings starting at $1,496
Used Chevrolet Tahoe
782 Great Deals out of 42,012 listings starting at $1,980
Used Ford F-150
2,775 Great Deals out of 211,556 listings starting at $1,400
Used Ford Mustang
562 Great Deals out of 36,312 listings starting at $1,500
Used Chevrolet Camaro
443 Great Deals out of 31,342 listings starting at $3,550
Used Honda Accord
1,093 Great Deals out of 65,131 listings starting at $561
Used Chevrolet Silverado 1500
2,457 Great Deals out of 173,268 listings starting at $795
Used Mercedes-Benz S-Class
145 Great Deals out of 7,613 listings starting at $2,000

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
24 listings starting at $5,450
2010 Mercury Grand Marquis For Sale
5 Great Deals out of 95 listings starting at $3,995
2009 Mercury Grand Marquis For Sale
5 Great Deals out of 85 listings starting at $2,995
2008 Mercury Grand Marquis For Sale
5 Great Deals out of 138 listings starting at $999
2007 Mercury Grand Marquis For Sale
3 Great Deals out of 144 listings starting at $1,995

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.