UberRoo, I don't burn oil and I don't have any aftermarket or performace parts on the car. The spark plugs look new although I suppose they could be the culprit. My fuel economy is normal and I agree that it's not likely my injectors. I'm telling you this car runs GREAT and the idle isn't rough.

It could, however be related to the vaccuum canister or the EGR valve I suppose. Although I thought that was more related to NO2? How can one tell if the vaccuum canaster is defective or needs to be replaced?

I just replaced a faulty O2 sensor and thought that might fix it, but it didn't.

I'm still stumped. Any more ideas out there?