Forum Discussion
pauldub
Apr 29, 2015Explorer
I had one go bad and there wasn't a CEL. I checked for codes anyway and found that there was a code stored for a miss on one of the cylinders. If you find a code, then you know exactly which cylinder is the problem without any trial and error monkeying around. I replaced mine with an OEM part from RockAuto. I don't enjoy replacing them enough to go with a cheap coil.
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