your ac stopped working on your car because the MAF sensor has an integrated intake air temp sensor. and when unplugged defaults to negative 41*F. its a safety feature so the evaporator core does not freeze. this also causes the engine to run very rich. i wonder if the oxygen sensors are working too "slow" and cant read the oxygen content in the exhaust fast enough to control the fuel flow to the engine. (thats just me thinking out loud) you really do need a scanner like they said so you can actually read data as the car is running and determine what is not reading properly.
