Check Engine Light and O2 Sensors

I have a 1999 Dodge Durango, 5.9L 4wd. The check engine light is normally on and it runs fine while it is on. Occasionally the Check Engine light will clear itself and a few things happen when it does. When idling, the rpm will drop below 600 and jump back up over 1000. Sometimes it will drop down low enough that the engine will stall out. It always starts up immediately. Also, when I tap the accelorator pedal (tap and release), the rpm will continue to rise and the vehicle will slowly and steadily accelorate. These issues last aprox 3-4 days until the check engine light comes back on, then it will run fine again until the light clears itself. I keep checking the light when it comes on and it keeps reading as the O2 Sensors (Bank 1 Sensor 1 and 2). I have recently had those sensors replaced, but that is all the computer is showing as the problem. Any ideas or suggestions?

Try a new Air filter, and clean the MAF/IACT with CRC MAF sensor cleaner.