Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
27,667 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

1998 Mercury Grand Marquis engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 1998 Mercury Grand Marquis:

Unsubscribe any time. We don't sell/share your email.

1998 Mercury Grand Marquis Owner Comments

problem #6

Dec 052009

Grand Marquis

  • 100,000 miles


The contact owns a 1998 Mercury Grand Marquis. Whenever the contact turned the vehicle on he noticed that the check engine light would appear on the dashboard. While examining the engine he also noticed that anti-freeze was leaking onto the engine. The vehicle has not been diagnosed by the dealer. The failure mileage was 100,000.

- Chicago, IL, USA

problem #5

Nov 012004

Grand Marquis 8-cyl

  • miles
On three separate occasions the vehicle has stalled while driving on the highway. Each time this happened the vehicle could not be restarted and had to be towed to the nearest garage. The dealer informed the consumer that service bulletin 12950 as issued in 1999 identifying a fix for this problem. Since the consumer's vehicle was no longer under warranty he was forced to pay for the repair.

- Basking Ridge, NJ, USA

problem #4

Apr 072004

Grand Marquis 8-cyl

  • Automatic transmission
  • 66,000 miles
While driving vehicle stalled. Consumer used a starter battery kit to restart the vehicle or contacted aaa to have the vehicle towed. The aaa representative indicated that the stalling may be due to engine motor failure. Dealership and sears retail store performed a diagnostic test, but no failure code was found. Also, the battery and air bag warning light came on. This failure almost caused rear end collision. Owner is an ex philadelphia Eagle football player named curtis bunch-black.

- Philadelphia, PA, USA

problem #3

Nov 072003

(reported on)

Grand Marquis 8-cyl

  • miles


Ltr fm louis hettinger(ky) owner of a 1998 Mercury Grand Marquis 4-door vehicle question if vehicle should be recalled because of fast idle. The iac valve was replaced on the vehicle but did not help the problem. The service dealer stated that there was nothing else they could do to resolve the issue. There were other consumers who experienced the same problem. (there was a fast idle upon start up and the vehicle would slow down at short notice. When the problem occurred, there was no way to control the vehicle)

- Lousiville, KY, USA

problem #2

Sep 211999

(reported on)

Grand Marquis

  • miles
While driving vehicle would stall for no reason. If at a stop sign/light & idling, would shut itself down. Been to dealer twice for stalling & mechanic cannot locate cause of problem. Its an intermittent problem.

- Cedar Grove, NJ, USA

problem #1

Aug 271998

Grand Marquis

  • Automatic transmission
  • miles
Serpentine fan belt & idler pulley / tensioner replaced due to noise.

- San Pedro, CA, USA

Not what you are looking for?