I have a 05 STi that is misfiring at idle but runs ok and pulled just about normal when i had it tuned at DB Performance. Shane said it is misfiring on cylinder number 2. it's either the coil or the plug. I've just put in one step cold plugs before i got it tuned so maybe its the coil that needs to be replaced. if you have 1 ignition coil please let me know. text 5076261875
