Wagoneer L6-258 4.2L VIN C 2-bbl (1982)
Spark Control System: Testing and Inspection
Dual Range CTO Valve
1. Connect a suitable vacuum gauge to port D (Dist.) of CTO valve.
2. When coolant temperature is below 149° F, or above 220° F, manifold vacuum should be indicated on gauge. When temperature is between 149°
F and 220° F, carburetor ported vacuum should be indicated. If defective, replace valve.
