Throttle Position Sensors May Fail and Cause Engine Performance Problems : Mercury Grand Marquis Common Engine Problems

Mercury Grand Marquis Throttle Position Sensors May Fail and Cause Engine Performance Problems

Mercury Grand Marquis Problem

21 Reports

Me Too

Model Years Affected: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2006

Average Mileage: 113,375 mi (65,000 mi - 175,000 mi)

The throttle position sensor (TPS) may fail. Common symptoms of a defective TPS can be rough idle, hard starting, hesitation on acceleration, poor fuel economy, and stalling.

Add to My Checklist

Find a Shop

Follow this Problem Report Unfollow this Problem Report

Visitor, 1999 Mercury Grand Marquis, 160,000 mi

going down the road and car just quit running and will not start

Flag This

Like | 7 people like this7
stalling 2006 merc, 2006 Mercury Grand Marquis, 94,000 mi

Rookie
my 2006 grand marquis mercury stalls. It will stall while sitting still, cruising on the enterstate and everywhere in between.the only thing consistent about the problem is that , I can traveled as much as 350 miles without A problems , then all of A sudden allthe dash lites come on and the car is power less. the dealership has changed A throttle body ($700+) the car stalled going home! Please, I need your inputs .

Flag This

Like | 3 people like this3
Visitor, 2006 Mercury Grand Marquis, 65,000 mi

Car will cut off going down the road, and it will start right back up, replaced fuel filter and went almost 800
miles and it did it again. The other day it cut off sitting in traffic, but it always cranks back up??

Flag This

Like | 2 people like this2
Visitor, 1990 Mercury Grand Marquis

my car has trouble getting into 1st gear

Flag This

Like | 1 person likes this1
Visitor, 1990 Mercury Grand Marquis, 68,000 mi

did a full tune up weeks ago to mee it acts like a plug not firing i was thinking maybe egr or tps might be bad,,rough idle chugs down the road

Flag This

Like | 1 person likes this1
Visitor, 1999 Mercury Grand Marquis

car idles rough and stalls while running wont turn on for awhile then starts few minuts later

Flag This

Like | 1 person likes this1
Visitor, 1999 Mercury Grand Marquis, 155,000 mi

itake maniflod blew i replaced it and new plugs. car ran fine for one day engine light came on and runs very rough. still not fixed

Flag This

Like | 1 person likes this1
Visitor, 2006 Mercury Grand Marquis, 125,000 mi

Idle problems, stalling, warmup problems, would have replaced idle air control valve if the car had one.
Of course, with its fly by wire throttle, it does not. Replaced tps sensor after testing and inspection upon removal. Old sensor was wollered out. Important note- machine screws that attach sensor are lock tighted on and require some heat to remove without snapping off. Heat gun works fine.

Flag This

Like0
jamesprince, 1996 Mercury Grand Marquis

Rookie
have stall in engine

Flag This

Like0
Visitor, 1999 Mercury Grand Marquis, 160,000 mi

going down the road and car just quit running and will not start

Flag This

Like | 7 people like this7
stalling 2006 merc, 2006 Mercury Grand Marquis, 94,000 mi

Rookie
my 2006 grand marquis mercury stalls. It will stall while sitting still, cruising on the enterstate and everywhere in between.the only thing consistent about the problem is that , I can traveled as much as 350 miles without A problems , then all of A sudden allthe dash lites come on and the car is power less. the dealership has changed A throttle body ($700+) the car stalled going home! Please, I need your inputs .

Flag This

Like | 3 people like this3
Visitor, 2006 Mercury Grand Marquis, 65,000 mi

Car will cut off going down the road, and it will start right back up, replaced fuel filter and went almost 800
miles and it did it again. The other day it cut off sitting in traffic, but it always cranks back up??

Flag This

Like | 2 people like this2
Visitor, 1990 Mercury Grand Marquis

my car has trouble getting into 1st gear

Flag This

Like | 1 person likes this1
Visitor, 1990 Mercury Grand Marquis, 68,000 mi

did a full tune up weeks ago to mee it acts like a plug not firing i was thinking maybe egr or tps might be bad,,rough idle chugs down the road

Flag This

Like | 1 person likes this1
Visitor, 1999 Mercury Grand Marquis

car idles rough and stalls while running wont turn on for awhile then starts few minuts later

Flag This

Like | 1 person likes this1
Visitor, 1999 Mercury Grand Marquis, 155,000 mi

itake maniflod blew i replaced it and new plugs. car ran fine for one day engine light came on and runs very rough. still not fixed

Flag This

Like | 1 person likes this1
Visitor, 2006 Mercury Grand Marquis, 125,000 mi

Idle problems, stalling, warmup problems, would have replaced idle air control valve if the car had one.
Of course, with its fly by wire throttle, it does not. Replaced tps sensor after testing and inspection upon removal. Old sensor was wollered out. Important note- machine screws that attach sensor are lock tighted on and require some heat to remove without snapping off. Heat gun works fine.

Flag This

Like0
jamesprince, 1996 Mercury Grand Marquis

Rookie
have stall in engine

Flag This

Like0

Car Problem Reports

Mercury Grand Marquis Throttle Position Sensors May Fail and Cause Engine Performance Problems

Mercury Grand Marquis Problem