I didn't replace the wires at the time due to low funds, but that was my first thought was the wires are doing it seeing they gave me a hard time coming off. Once I have the money I'll try some new wires. I didn't have it scanned to see if it had knock before, but I plan on doing a fwi and some other mods in the future and wanted to be safe so I went a hair cooler for these plugs. I didn't gap them because they are platinum and if you gap them you will crack the coating and at that point there is no benifit. I'm going to take them out and check the gap though, they're supposed to be pre-gapped at .060" but you can't rely on them I guess. The cooper cores are better for performance because they expell the heat quicker which will help with more power, the platinum/iridate plugs are designed to have a longer life. 100K versus once a year. matter of preference, this is my wifes driver so it doesn't need to be a hot rod. If I'm wrong about the reason most go for the cooper core please correct me. I'm only going off of what I remember from a thread on this matter. Thanks for the help guys. I'm gonna pull the plugs and wires this weekend (weather permiting) check the gaps and see if there is any obvious damage to the wires, maybe i'll find one isn't completely snapped on or something. I hope I can get this straightened out, Even not running right I can feel a big increase in nut since the new plugs.