1992 Mercury Grand Marquis Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1992 Mercury Grand Marquis
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1992 Mercury Grand Marquis ProblemsTransmission Failure Common Due to Front Pump Failure
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.
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.
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"