Well best way I can put it is......Once the car is at its normal operating temperature it starts to have a slight misfire. When i'm accelerating there is no misfire. When i'm just holding the gas steady it misfires slighty. Sitting at idle it misfires slightly. I have 91,112 miles on the 2.2L motor, at 85,000 miles I replaced the plugs, wires and fuel filter with factory replacements. I do have a check engine light on but the only code it is pulling is PO420 b/c of my freeflow cat. It just started at about 90,800 miles. I've had my MSD coilpacks from about 75,000 miles. When i hook up a scanner at work it doens't pull anything on the misfires. Any Ideas on what it could be?

O2 sensor could still be cooked

Haha! Stupid me! Put a fresh tank of gas in today after I got off of work and now it runs fine. No sputters.....Weird how that works......

good to know it was a really e x fix