would a bad spark plug throw a code? I know a COP does,..but not sure if a bad spark plug. I ask because I have a 07 ford f150 supercharged and it seems to have a bad spark plug because the whole engine vibrates,..when in gear, and vibrates less when in park, also when you go WOT it backfires, thats what I assume not sure if its that. It was working fine one day and the next morning it started to vibrate. If any one has had this happen before,..could you let me know, to see if Iam in the right path thanks in advance!!

 

yep, mine did after 13,000 miles on new plugs!!