There are a few possibilities that i would check out. For example: You can have a bad belt in one of the rear tires. Or a rear wheel bearing could be bad. Or a carrier bearing may be bad. Please check and make certain that the lug nuts are tight. A pinion bearing gone bad is a slim but possible option.
However, the first thing i would check would be the rear universal joint. If the universal joint is seized or the needle bearings in the universal joint are bad it would certainly cause the vibration that you are describing.
Mercury Grand Marquis was created in 1983.
Perhaps your timing.
A bad starter can cause a Mercury Grand Marquis to not start. A bad alternator or a problem with the security system can be the cause for the car not starting.
When making changes to the fuel system, a diagram can help guide in the repairs. A fuel system diagram for a 1993 Mercury Grand Marquis can be found in its maintenance manual.
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.054 is the gap for the Mercury Grand Marquis.
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No , the last model year for the Mercury Grand Marquis was the 2011 model
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yes
The first generation of Mercury Grand Marquis cars has been in production since 1975. The last Mercury Grand Marquis was manufactured in January 2011.
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