Question about 1999 Ford Explorer

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Problem when only when it's hot outside

I have been experiencing a problem with my 1999 Ford Explorer only when it is hot outside.

Anytime it is above about 75 degrees outside, I can only drive the vehicle for around 30 minutes before it start chugging along and jerking. This has never happened when its cool out. I've driven over 100 miles at a time when its cool with no problem.

Generally, we have to run short errands and then let the vehicle cool for a few hours before going out again. My temp gage doesn't show the car is overheating at all. It looks normal.

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  • JenECole Aug 02, 2008

    Thanks for the tip. We'll look into that.

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This is a symptom of a bad coil. The car will generally idle well, and performance will deteriorate when the car (and the coil pack)warms up.

Posted on Jul 29, 2008

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