Mercury Grand Marquis Questions
Mercury Grand Marquis
Sat, 02 Jul 2011
I went out this morning (my birthday) and turned on the ignition ...
I went out this morning (my birthday) and turned on the ignition to my 2000 Mercury Grand Marquis. There was an explosion-like sound and then the engine was running very rough - sudden compression loss in one cylinder (closest to passenger seat). I could put my hand over the engine and feel the air compressing as the piston moved. Any ideas what happened? I've not had a problem before except there's an electrical short somewhere and also the windshield wipers only work in high.
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