C 2500 3/4 Ton Pickup 2WD V8-379 6.2L DSL VIN J FI (1984)
Throttle Position Switch: Adjustments
Fig. 56 Throttle position switch adjustment. V8-379 engines with light duty emissions 1983-87 except Calif.
V8-379 DIESEL ENGINE
1983-87 Except Calif.
1.
Disconnect electrical connector to TPS switch and loosen switch mounting screws.
2.
Connect ohmmeter between pink (feed) and yellow (EGR solenoid) wire terminals in switch connector.
3.
Position 0.646 inch (switch closed) gauge block on Wide Open Throttle (WOT) stop boss on injection pump, Fig. 56, and open throttle until WOT
stop screw contacts boss.
4.
Hold throttle position, rotate TPS switch until ohmmeter indicates continuity, then torque switch mounting screws to 53 inch lbs.
5.
Remove switch, close gauge block and position 0.668 inch (switch open) gauge block between WOT stop screw and stop boss on pump.
Ohmmeter should indicate infinite resistance.
6.
If ohmmeter indicates continuity with switch open gauge block installed, repeat adjustment procedure until meter indicates no continuity with
switch open gauge block between stop screw and boss and continuity with switch closed block between stop.
