6000 V6-173 2.8L VIN X 2-bbl (1983)
Manifold Pressure/Vacuum Sensor: Testing and Inspection
Component Diagnostic Charts
Chart C-1D MAP and BARO Output Check
Fig. 008 - Chart C-1D Map and Baro Output Check
NOTE: MAP and BARO sensors are essentially the same device--one--MAP--measures the difference between pressure in the manifold and
atmospheric pressure, and the other--BARO--measures atmospheric pressure.
1. Check that sensor voltage is highest when manifold pressure is highest--output normally is in the middle range for specific altitudes.
-
Low voltage increases spark advance.