http://www.grandprixforums.net/ultim...ide-52020.html
http://www.grandprixforums.net/mass-...car-52226.html
I'd suggest using the Aerforce to see what the MAF frequency is at idle.
I was under the impression the PCM compares the MAF input to the VE table to decide if the MAF is working or not.
http://www.grandprixforums.net/ses-c...age-27572.html
The following are general possible causes:
Large Vacuum Leaks, split Intake Air Boot or PCV Hose, defective intake manifold gaskets
Mass Air Flow Sensor (MAF) Circuit and or wiring problems
Defective Barometric Pressure Sensor (possibly bad MAP input for GPs)
Dirty or Contaminated Mass Air Flow Sensing Wire or Filament
PCM software needs to be updated
