If you have a 4.6 (8cyl) and each cyl has a coil, you may need to remove the boots and spray with compressed air or leave the boots out for a day or two. Also inspect for cracs in boots and coils, if there are cracks, what may occour is carbon tracking and high voltage will follow the carbon track. This being the case you may have to replace them or try a wipe down. A cheep way may be to switch one of them and see if you transplanted the problem.
It is unclear to me how washing would get water in the cylanders----Good luck
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Thursday, July 10th, 2008 AT 10:26 AM