My idle is different all the time. It doesnt go up and down but it seems to idle differently everytime i start the car. Plugs,wires,cap and rotor are all fairly new. Fuel filter was also changed. Cleaned the IACV and screwed in the plastic thing on the FITV. Cleaned the throttle body and IM. And i cant find any vacumm leaks anywhere. What else could it be ?