Vacuum Regulator (3 and 4 Port)

1. Remove the vacuum line from distributor port, and install a vacuum gauge (Figs. 1 and 2).

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

3. With the color codes different, vacuum readings are identified.

^ Black is 20 kPa (6 inches Hg).

^ Green is 23.6 kPa (7 inches Hg).

^ Red is 27 kPa (8 inches Hg).

If the color code does not meet the respective vacuum reading, replace as required.

NOTE: This procedure is applicable to both types of vacuum regulators.