Four problems related to gasoline engine have been reported for the 1996 Mercury Grand Marquis. The most recently reported issues are listed below.
No summary listed for above vehicle.
Noticed drive train vibrating and shaking progressively worse at 70mph.
The vehicle shudders and vibrates when traveling in 3rd and 4th gear and then looses power. Nlm.
Fast idle--800 rpm at neutral. Self-accelerates on flat surface up to 9 mph.