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 ProblemsIntake Manifold May Crack Leaking Coolant Behind the Alternator
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.
Transmission problems are common in this model, often as a result of a failed front pump. The pump loses its ability to create hydraulic pressure, which an automatic transmission needs to function. A sign of front pump failure can be a whine type noise.
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.
2001 Mercury Grand Marquis QuestionsWhy is one of the positive leads on my Grand Marquis corroding under the coating (1 answer)
I'm check battery leads one of the positive leads is corroding