With Speed Density Update

Mass Air Flow (MAF) / Manifold Air Temperature (MAT) Sensor:

The Mass Air Flow (MAF) sensor is no longer functional in this vehicle. The Engine Control Module (ECM) has connections to the MAF sensor, but will not receive any input since power to the MAF has been removed by disconnecting the MAF relay. However, the Manifold Air Temperature (MAT)sensor (which is a part of the MAF sensor assembly) still remains functional.