Express 1/2 Ton Van V8-305 5.0L VIN M SFI (1998)
Mass Air Flow (MAF) Sensor: Testing and Inspection
The scan tool reads the MAF value and displays it in grams per second (gm/Sec). At idle, it should read between 5-7 gm/Sec on a fully warmed up
engine.
Values should change rather quickly on acceleration, but values should remain fairly stable at any given RPM. When the VCM detects a
malfunction in the MAF sensor circuit, the following Diagnostic Trouble Code (DTC)s will set:
^
DTC P0101 system performance.
^
DTC P0102 frequency low.
^
DTC P0103 frequency high.
