My son is driving my old 97 F-150 5.4L with about 200K at college. Lately the original coils are starting to go. He gets a flashing check engine light for a particular cylinder and we change out the coil and the plug and all is good. I know I should do them all but the way this winter has been I haven't felt like it and was hoping the rest could be changed in warmer weather. I changed out cylinder 1 coil and plug and cleared the codes and all was good for about a week and he called me and said it was acting up and missing again on the same cylinder. I changed the coil and it still was missing, so then we changed the plug and it was fixed. Glad it was cylinder 1 and not 4 or 8 because those are a bear to get at! Took 10 min to fix.
I think this is the first time that I have ever had a plug go bad after a few hundred miles. Plug was a Motorcraft. Anyone else have this happen? Is quality going down?
I think this is the first time that I have ever had a plug go bad after a few hundred miles. Plug was a Motorcraft. Anyone else have this happen? Is quality going down?