Mercury Grand Marquis owners have reported 3 problems related to fuel hoses lines/piping and fittings (under the gasoline fuel system category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Mercury Grand Marquis based on all problems reported for the Grand Marquis.
I filled the fuel tank. Shortly I noticed that the fuel gauge level was rapidly dropping. I stopped the vehicle on the side of the interstate. Fuel was pouring from beneath the vehicle. A large puddle of fuel collected under the vehicle. I had the vehicle towed. The fuel pump had stuck at 65 psi and ruptured the fuel line. I had the fuel line and pump, along with the filter replaced.
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all problems of the 2000 Mercury Grand Marquis
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1999 Mercury Grand Marquis LS 4. 6l
(1) drove vehicle in a normal way, commuting from home to work daily. No speeding. In the mornings properly wait for 10 minutes to warm up the vehicle's engine prior to driving. Kept proper maintenance schedule by Ford/Mercury dealership. Never brought up to my attention of the possible default this part may cause down the line. Had a complete coolant flush for radiator. Replaced with new coolant. (2) misfire in cylinders 6 + 2. Check engine light on. Small amounts of coolant leakage onto top part of engine, profusely around the spark plug chambers. Coolant come in contact with alternator affecting check battery light to go on. Vehicle showed signs of intense shaking at idle and at normal driving conditions within 1 hr after check engine light came on. Vehicle is a 199 Mercury Grand Marquis LS 4. 6l. Vehicle could not be driven w/o being extremely shaky while driving. Hesitation present. On cold days, small presence of coolant traces were found inside the spark-plug pits along side the ignition coils and at times small vapor came from inside the engine noticed from inside the driver's seat coming from inside the hood causing concern. . Read more...
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all problems of the 1999 Mercury Grand Marquis
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Consumer dismayed to notice the smell of fuel as she drove and parked the vehicle. The smell would be present when the vehicle was parked as well. The fuel was leaking into the brake line. The idler and pitman arms were replaced.
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all problems of the 1997 Mercury Grand Marquis
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| Problem Category | Number of Problems |
|---|---|
| Carburetor problems | |
| Tank Assembly problems | |
| Fuel Pump problems | |
| Fuel Injection problems | |
| Gasoline Fuel System problems | |
| Tank Filler Pipe And Cap problems | |
| Fuel Injector problems | |
| Fuel Hoses Lines/piping And Fittings problems | |
| Fuel Delivery problems | |
| Gas Tank Strap problems |