Prospeeder

yea unplugging the MAF will set it to preset mapping using manifold vacuum. I fit runs perfect with it unplugged, its bad or there is a large leak between the MAF and throttle body. But if its, like your saying, no change then theres a problem like big big vacuum leak after the throttle body, or lack of fuel.

Try clamping off the Brake Booster(or just removing the line and blocking it) and see if it changes. Try seeing if the PCV system is working correctly. I see plenty of cars with stuck open Crankcase vent valves and broken PCV hoses. Check fuel pressure.