Can bad coil packs make new problems?
I own a 2003 Scab , 5.4, 4x4, and have not had a lick of trouble with it. I talked my father into buying a 2005 Screw 5.4, 4x4. The truck had a bad misfire with 3,800 miles on it. The dealer replaced /repaired the coil on plug system and said that would be the end of the problem. My father went on a road trip and the misfire started again in the middle of the desert on the way to Las Vegas. He had to drive it about 70 miles with the misfire. A dealer in Vegas repaired the COP's again. I just wonder if any other issues will surface due to the fact that the truck was driven with the misfire. Any possible damage to sensors or catalytic convertors or anything for that matter. He is taking it to a local dealer today for an inspection, anything i can tell him to watch out for or ask about would be appreciated. Thanks.
I posted this on the 05' forum but no luck with any answers, thanks. I have searched and no one seems to address any future consequenses of the bad packs.