Mechanics

MERCURY MARQUIS COMPRESSION PROBLEM

1987 Mercury Marquis • 92,000 miles

Upon hard acceleration ramping on to the interstate, engine has a intermittent hard miss. It has new platnums, wires, cap & rotor.
Smooth idle at start up but occasional light miss when warm at idle.
Any help out there?
tom
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November 30, 2012.



Tom: CHeck to make sure the fuel pressure is within spec and check engine compression. You may have a cylinder that is low on compression.