Mercury Grand Marquis Problem Report

Mercury Grand Marquis Engine Performance Problems Due to Failed Throttle Position Sensor

(31 reports)

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.

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 . -
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?? -
ENGINE WILL START ROUGH IDLE NO THROTTLE NOT RESPONDING RICH SMELL OF FUEL BEFORE DIEING TRYED TO RESTART WOULD NOT. NO CODES SHOWED UP TESTED T.P.S USING METER NOT RESPONDING UNLESS YOU TAP THE SENDING UNIT REPLACED EVERYTHING GREAT. -
going down the road and car just quit running and will not start -
bucks and hesitates around 35 miles per hour -
car idles rough and stalls while running wont turn on for awhile then starts few minuts later -
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 -
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 -
stalls, hard to start heistant all the time. when driving to speed up, heistant, got to push gas pedal couple times. -
my car has trouble getting into 1st gear -
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. -
have stall in engine -
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