What is it that could cause this to happen and is there a cure? Its not alot of moisture, but just enough to cause slight hesitation and cause me to get codes for cylinders 7 and 8 misfire. The bottom ends of the plugs look good, its just the plugwires look damp and have a rusty color on them.

 

Ok, now then. I am a SON of a mechanic, though I have been called much worse. I would belive that your problem could be that the heater hose(s) that run over the plugs. I would do the (hand) check. Run your hand on the heater hose(s) from the fire wall, as soon as the temps will allow you to.
*cold in Indiana* and it's real early, so if I am wrong....well I tried.
HAPPY HOLIDAYS good luck

https://www.f150online.com/galleries....cfm?gnum=5054http://www.f150online.com/galleries/....cfm?gnum=5054

 

1509,

Is it antifreeze or water that gets in the holes? Has this happened more than once? After paying off road? After an engine cleaning? Engine maintenance like a plug or plug wire change? Plug #7 and #8 are on the driverside and closest to the firewall. Are these the plugs?

Regards

Jean Marc Chartier