tested to see if its the coil pack? Also I did have an issue in regards to misfiring on cylinder 3 and It ended up being my Alt was starting to fail. It was only putting out high 11's max. I had an extra Alt laying around and once I installed it I was running mid 13's and no more misfiring. Hope I helped shed some light on the subject for you...Also BTW I love your sig the background and the car just look great.