2001 Mercury Grand Marquis Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2001 Mercury Grand Marquis
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2001 Mercury Grand Marquis ProblemsThrottle Position Sensors May Fail and Cause Engine Performance Problems
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.
The composite (plastic) intake manifold may crack near the thermostat housing and cause a coolant leak. Ford released an updated manifold that was reinforced to prevent a recurrence. No recall was issued for this problem but Ford did extend the warranty to seven years on some models from the date of purchase.
The EGR valve position (EVP) sensor can fail on this vehicle. The EVP sensor measures the EGR valve position and transmits the date to the engine control computer. If it fails, drivability and fuel economy can suffer, the Check Engine Light will commonly illuminate.
2001 Mercury Grand Marquis QuestionsWhen dealing with transmissions, can i put my 2000 Mercury Grand Marquis LS transmission in my 2001 Mercury Grand Marquis LS transmission? (1 answer)
i have checked horn by removing and touching with live jumper cable. was able to make it make noise. also checked fuse, checked out ok.