E 350 Van L6-300 4.9L VIN E 1-bbl (1982)
Distributor Vacuum Control: Testing and Inspection
Vacuum Regulator
Procedure
1. Disconnect vacuum line from distributor port and connect a vacuum gauge.
2. With engine at idle, the vacuum gauge reading should be within 1 inch Hg. vacuum of the calibration point. The calibration point of each valve can
be identified according to color code as follows: Black, 6 inches Hg.; green, 7 inches Hg.; red, 8 inches Hg.
3. Replace valve if not within specifications.
