One problem related to gasoline fuel system has been reported for the 1998 Mercury Grand Marquis. The most recently reported issues are listed below.
Upon an early morning start consumer noticed fumes/odor within the passenger's compartment. Also, the problem occurred when the heater was being used. Consumer contacted the dealer, dealer was unable to determine the cause. . Et.
| Tank Assembly problems | |
| Fuel Injection problems | |
| Fuel Pump problems | |
| Tank Filler Pipe And Cap problems | |
| Gasoline Fuel System problems |