Mercury Grand Marquis owners have reported 422 engine and engine cooling related problems since 1996. Table 1 shows the 29 most common engine and engine cooling problems. The number one most common problem is related to the vehicle's manifold/header/muffler/tail pipe (212 problems). The second most common problem is related to the vehicle's engine and engine cooling (52 problems). For details of each of the problem category, use the links in the table.
The contact owns a 1999 Mercury Grand Marquis. The contact stated that the vehicle had a leaking intake manifold. The vehicle was taken to an independent mechanic and diagnosed that the intake manifold needed to be replaced. The vehicle was not repaired. Read details...
The contact owns a 2002 Mercury Grand Marquis. The contact stated while driving 50 mph at night, the cruise control mode malfunctioned, and the speed of the vehicle increased independently. The contact stated that the brake pedal was depressed several times to the floor, but the vehicle failed to Read details...
The plastic intake manifold in my 1998 Grand Marquis has cracked resulting in engine coolant fluid leak and engine failure. It is being repaired today. The car has approximately 87,000 miles. I understand that this occurs because of the material used for the intake manifold. Read details...
2007 Mercury Grand Marquis. Consumer states defect with computer/powertrain control module the consumer stated when his wife attempted to apply the brake on two separate occasions, the vehicle failed to reduce its speed. Consequently, his wife went through the red light. Read details...
My 2006 Mercury Grand Marquis LS premium car has an unresolved stalling issue. The problem is exacerbated when the car¿s engine warms up, especially during warmer weather. It tends to stall out at extended stoplights or if the vehicle needs to be stopped within a short distance. Read details...