Question about 2001 Mercury Grand Marquis

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What is an ignation tune up for a 99 Merc. Gnd.

Car stumbles in the 35-45 mph gange. With no ac on engine runs fine at stop but when ac on engine run sporadicly ruff at stop and accelerating.
Have replaced the fuel filter, had no moisture spotting on any of the Ing. coils and misted around elec. connection and no sparking was noticed. Have put Lucar Inj Cleaner in gas tank.
What is an ignation tune up for a 99 Merc. Gnd. Marquis consist of?

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A full ignition tune up would be new spark plugs and wires.A cap and rotor if it has those. Do any fuel system cleaning before changing the plugs.

Posted on Jun 22, 2009

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