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.
Resources for the Repair and Maintenance of your 1994 Mercury Grand Marquis
1994 Mercury Grand Marquis
1994 Mercury Grand Marquis Problems
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.
1994 Mercury Grand Marquis Recalls (Recent)
Summary: THE NUTS AND BOLTS THAT ATTACH THE REAR BRAKE ADAPTOR TO THE AXLE HOUSING FLANGE CAN LOOSEN AND EVENTUALLY SEPARATE. IF ONE OR MORE OF THE NUTS COME OFF THE BOLTS, DAMAGE TO THE PARKING BRAKE ASSEMBLY OR TO THE ANTILOCK BRAKE SYSTEM (ABS) SENSOR AND SENSOR RING (IF SO EQUIPPED) WILL OCCUR. IF ALL FOUR NUTS ON ONE END OF THE AXLE COME OFF THE BOLTS, DAMAGE TO THE BRAKE HYDRAULIC LINE OR THE PARKING BRAKE CABLE CAN OCCUR.Learn more »
Summary: ON CERTAIN PICKUP TRUCKS, PASSENGER VEHICLES, SPORT UTILITY VEHICLES, AND MOTOR HOMES CHASSIS, THE SPEED CONTROL DEACTIVATION SWITCH MAY, UNDER CERTAIN CONDITIONS, LEAK INTERNALLY AND THEN OVERHEAT, SMOKE, OR BURN.Learn more »
Summary: FORD IS RECALLING 225,000 MY 1992-2003 ECONOLINE, MY 1993-1995 TAURUS SHO, MY 1992-1998 CROWN VICTORIA, MY 1993 BRONCO, F-SERIES, MY 1995-1997 F-SERIES SUPER DUTY STRIPPED CHASSIS, MY 1992-1998 MERCURY GRAND MARQUIS, AND MY 1992-1995 LINCOLN TOWN CAR VEHICLES. THE AFFECTED VEHICLES WERE PREVIOUSLY REPAIRED USING A WIRING HARNESS THAT IS NOT COMPATIBLE WITH THE VEHICLE CIRCUIT POLARITY.Learn more »
1994 Mercury Grand Marquis Questions and Answers
When I turn my wheel or go over a bump or anything my car squeaks loudly in the front
From my last question you said my shocks and suspension could be worn out-will it help if I get them lubed-oil, because the car had been sitting a long time when i brought it
my engine is losing oil--i fill it and drive and it leaks out to a certain point
and then stops leaking, leaving about
2 qts. in the engine...someone told me that it was probably the front and/or...
engine stalls while waiting at long traffic lights.
Transmission in D
starts no problem right after
plug and wires :new
1994 Mercury Grand Marquis Reviews
ball joint problems , put $1,500 in getting them fixed ,car wears them out in less than 10 years
getting the proper brake pads is also a issue, sence thier made in four versions police and non police version with power brakes , angled tapered pads and flat one can make the differance in wear and squeaky noise in less than 3 months. when to 4 auto stores and they all gave me conflecting data on the proper pad based on what they stock, giving me the wrong part to make a sale also poor knowledge on the versions of pads
My marquis is a mean machine, I once had her at 125mph still with a couple thousand rpms left. I change her oil every 3000 miles but still smokes when in reverse. Still, with 197000 miles on her she still can do it. She had police equipment in it, but i never seen a police interceptor grand marquis. I love my car, bottom line. Now installing a supercharge stage 2. 5.0 1994 mustang engine. Get flowmasters 40 series
My Grandma owns a 1994 Grand Marquis and I help her with it on occasion. She bought it new and it has great features considering when it was made. It has Ford's great burn me/freeze me settings on the AC/heater and the interior is quite comfortable. It's not a hot rod but the engine makes good power and has been reliable. The only problem in recent memory was an issue with the alternator bearing (replaced alternator). As a driver you feel a little disconnected from the road but that's really how the American luxury cars were in the 90s. Otherwise it handles pretty well.