damn that blows, did you test it with the maf off? if it acts diffently then at least you'll definitely know its not the maf, before you go out and buy one
this is what i did when i burped mine. when the car is still cool enough to open the radiator cap, jack up the car, turn the heater on full, then fill as it as needed, once the car warms up you'll see the air bubbles rise