K 2500 3/4 Ton Pickup 4WD V8-350 5.7L VIN L 4-bbl (1983)
Secondary Throttle Valve: Adjustments
Fig. 12 Secondary throttle valve lockout adjustment
Lockout Pin Clearance
With choke and throttle valves fully closed, measure clearance between lockout pin and lockout lever. Maximum clearance should not exceed .015
inch. To adjust, bend lockout pin, Fig. 12.
Opening Clearance
Push downward on fast idle cam tail to open choke valve, then push lockout lever counterclockwise so upper end of lever contacts the round pin in
fast idle cam. Measure clearance between lockout pin and lockout lever toe. Clearance should be .015 inch. To obtain proper clearance, file metal from
end of lockout pin, Fig. 12.
