Problem Reports
Mercury Grand Marquis
Report: Throttle Position Sensors May Fail and Cause Engine Performance Problems
Mercury Grand Marquis Problem
Model Years Affected: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2006
Average Mileage: 119,250 mi (68,000 mi - 160,000 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.
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Report #1Visitor, 1999 Mercury Grand Marquis, 160,000 mi
going down the road and car just quit running and will not start
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Report #2Visitor, 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
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Report #3
Rookiehave stall in engine
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Report #4Visitor, 1999 Mercury Grand Marquis
car idles rough and stalls while running wont turn on for awhile then starts few minuts later
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Report #5stalling 2006 merc, 2006 Mercury Grand Marquis, 94,000 mi
Rookiemy 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 .
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Report #6Visitor, 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
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