Wagoneer L6-258 4.2L VIN C 2-bbl (1982)
Thermostatic Air Cleaner: Testing and Inspection
Reverse Delay Valve
Disconnect vacuum hose from red end of valve and apply an external vacuum source of 2-4 inches Hg, noting time required for vacuum to drop to
zero. Replace valve if time is not within 210 to 375 seconds on 1980 models, or within 4.5 to 13.2 seconds on 1981-82 models.
