W250 3/4 Ton Pickup 4WD V8-318 5.2L VIN T 2-BBL (1983)
Throttle Full Close Switch: Description and Operation
Fig. 4 Switches & sensors location. V8 engine
The carburetor switch, Fig. 4, is located on the end of the idle stop and it signals the computer when the engine is at idle. Whenever the curb idle
screw touches the carburetor switch, there will be no additional advance from the vacuum transducer or changing of the carburetor air fuel ratio.