98mustangmatt

I felt a miss in my 98 gt about a week ago and i replaced the plugs with platinum plugs, I didn't feel any more misses for about 5 days when it would only seem to do it on the first start up in the morning when its cold outside and the engine is cold and I don't feel it as much when its warmer outside.

the miss is on cylinder 5&6 if that matters....

I wanted to take it to myrtle beach at the end of the month so i'd like to get it fixed asap

it does not throw a code for a misfire but i have a reader that tells me everything the car computer records.

Bert

Very possible the coil packs or boots are the problem. What engine is it?

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Bert

98mustangmatt

4.6 135k 5speed all stock

Bert

Look at the boots on the coil packs. If they look okay, you could try switching the coils and see if the misfire moves with it.

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Bert

98mustangmatt

could it be caused by low engine speed? 45 in 4th gear is ~1800 rpm

Bert

Very doubtful. Check those boots and switch the coil packs.

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Bert