Question about 1998 Mercury Grand Marquis
It is probably the coil packs or spark plugs. Buy a bottle of Prestone complete fuel system cleaner and add to gas. If this does not solve the problem, check each coil pack for spark. One or two may need replaced. This would be a good time to change the spark plugs also. Be sure to use platinum plugs.
Posted on Aug 23, 2009
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Posted on Jan 02, 2017
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