Vacuum Regulator (4-Port)

Vacuum Regulator (3 & 4 Port):

1. Remove the vacuum line from the distributor port of the regulator valve, and install a vacuum gauge.

2. With the engine at idle, the vacuum gauge reading should be within 1" vacuum (3.4 kPa) of calibration point.

3. Vacuum calibration points are identified, with the different color codes:
Black is 6" vacuum (20 kPa)
Green is 7" vacuum (23.6 kPa)
Red is 8" vacuum (27 kPa)

4. If gauge reading does not meet color code indicator, replace vacuum regulator.