Table 1 shows twelve common engine and engine cooling related problems of the 1998 Mercury Grand Marquis. The number one most common problem is related to the manifold/header/muffler/tail pipe (ten problems). The second most common problem is related to the car stall (six problems).
The contact owns a 1998 Mercury Grand Marquis. While driving various speeds, the engine misfired and hesitated to respond. The vehicle was taken to an independent mechanic who diagnosed that the plastic intake manifold was cracked, which caused anti freeze to leak out and damage the engine coils. Read details...
On three separate occasions the vehicle has stalled while driving on the highway. Each time this happened the vehicle could not be restarted and had to be towed to the nearest garage. The dealer informed the consumer that service bulletin 12950 as issued in 1999 identifying a fix for this problem. Read details...
Plastic intake manifold cracked and leaking coolant around thermostat area that squirts out under driving conditions and pools around fuel injection and contaminates electronics and serpentine belt and pulleys. Could leak to overheating and engine failure . Poor driving condition. Read details...