mines running about the same and i have ngk bkr9eix iridium plugs.my old ones were gapped at .75 where as i have gapped my new ones at .65.i havnt used it yet so i dont know if its going to be any better.at .75 it only ever give me a problem once on boost in 3rd,but on the advise of someone else i was told to gap my new ones at .65.