misfire mayhem................
misfire mayhem................ alright guys. please help me find out this eternal struggle with my car. it all started when i put NGK TR 55 iridium plugs in my car 'cause i thought it would make my car a little faster. (big mistake.....didn't notice and difference ) then i put some 100 octane in my car, and the same night my car misfires like crazy. turns out i burnt up every single spark plug. i go ahead and perform a tune up on it.everything goes back to normal. a month later, my car is missing again but not as bad and not as frequently. some days it will do it and some days it won't. the only mods i have done to the car are just all the free ones. now when i say the car "misfires", you can hear noticeable "bursts" of air from the cutout and the idle will jump a little. can any of you LS1 guru's tell what what i can check for, before i take it back to andy's auto?
