1992 Mercury Grand Marquis Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1992 Mercury Grand Marquis
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
Never overpay. Check prices with our estimator
1992 Mercury Grand Marquis ProblemsEVP Sensor Failure May Cause Drivability/Fuel Economy Issues
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.
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 car had 64600 miles on it and the headlights started going out while driving, which can be very dangerous. The problem is in the Light Control Module which is an expensive part (around $500 to $600 + labor).
1992 Mercury Grand Marquis QuestionsI had my merc a/c serviced, new radiator, thermostat, flushed ,new antifreeze . (1 answer)
flushed heater core seems to flow normal. Cannot get warm air at any time, unless drive 50 miles. then get a little heat "HELP"