'02 Mountaineer cylinder misfires on cold mornings | Ford Explorer Forums

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'02 Mountaineer cylinder misfires on cold mornings

ptprender

New Member
Joined
October 9, 2010
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City, State
Detroit, MI
Year, Model & Trim Level
2002 Mountaineer V6
Hi,

I've got a 2002 Mountaineer V6 w/ 120k miles and am an amateur learning repairs as I go to keep it running. I've replaced the front bearings, the brakes, the serpentine belt, and some sensors.

This week it started misfiring cylinders (#4 on Wed, #6 on Thurs, #5 yesterday) on cold mornings. It runs fine after the engine warms up after 5 minutes or so. The plugs and wires have never been changed, so I was going to start there because they're original and need to be replaced anyway. Thought I might need to consider replacing the coil as well. Any advice on how to diagnose the real problem would be appreciated. Thanks much!
 






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