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Old 01-26-2016, 03:52 PM   #1
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Life of coil packs

My car has recently begun misfiring, so I replaced the spark plugs (broke 4 and had a blast getting them out), however the car is still misfiring. I eventually got a CEL saying cylinder 8 was misfiring. My car has 80,000 miles, is it possible that the coil packs should be replaced? Any other ideas on what could cause the misfire? Thanks, and any input is greatly appreciated.
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Old 01-26-2016, 05:02 PM   #2
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You can try switching the coil packs and see if it follows it but sounds like that may be the issue. Everyone says to stay away from the aftermarket ones and just bit the bullet and get them from Ford.
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Old 01-31-2016, 05:11 PM   #3
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As mentioned swap pack 8 out with another one, 2 is easy, and see if it follows it. Then replace that one. Ya, I'm sure you enjoyed pulling those plugs just as I did!
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Old 01-31-2016, 05:46 PM   #4
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Carefully inspect the spark plug boot on the #8 coil. It is possible that it was torn, or otherwise damaged, when the spark plugs were replaced.
If you find any damage, the spark plug boot can be purchased and replaced separately.
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Old 01-31-2016, 06:58 PM   #5
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The actual Ford coils themselves (the electronic part) lasts for a loooooooooooong time. Its the boot and spring that usually go bad and they can be replaced as Stray said. The springs/boots on a COP setup are basically like doing the wires on a 98-down. You are replacing the connecting end and the rubber boot in both cases.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
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