Hey guys, My 06 GT only has 17k miles and is perfectly maintained and runs great except for a slight idle fluctuation just after it’s started and goes away if you tap the gas pedal or it’s warmed up. The car has a K&N intake, Diablosport Predator tune and Moroso axle back spiral flow exhaust. No CEL or any other issues at all. I cleaned the throttle body, but didn’t remove it so it is possible the back of it needs to be cleaned (which I am going to do next) and the MAF looks perfectly clean. It has new plugs and with only 17k miles I can’t see the O2 sensor being bad. Just wondering if anyone here has experienced the same thing. Sorry for the long post but I wanted to give you all of the details. Thanks a lot!

 

I seriously doubt there's anything wrong with the O2 sensors. It's more likely you just need to remove the TB and clean it properly.