6.2L Diesel Light Duty (VIN C)

Remove air cleaner assembly and vacuum hoses. Disconnect TP sensor connector and install jumper wires between TPS and TPS harness connector. Turn ignition on, engine off.
Install .646 Gauge Block (J-33043-2) between gauge boss on injection pump and WOT stop screw on throttle shaft. See Figure and Figure . Rotate throttle lever and hold the WOT stop screw against the gauge block.
Using a DVOM, measure and record voltage between TP sensor connector terminals "A" and "C". This is TP sensor reference voltage. Measure and record voltage between TP sensor terminals "B" and "C". This is TP sensor voltage.
TP sensor voltage should be within 3 volts of TP sensor reference voltage. If voltage reading is not within tolerance, adjust TP sensor.
Loosen TP sensor mounting screws. Rotate TP sensor until correct sensor voltage is obtained. Tighten TP sensor mounting screws. Check TP sensor voltage by releasing throttle lever, allowing it to return to idle stop position. Check voltage reading between terminals "B" and "C".
Return throttle lever against gauge block. Check voltage reading. Voltage should be less 2.2 volts at closed throttle and return to within .03 volts of adjusted voltage, when throttle is again opened against gauge block.
If voltage reading does not return to TP sensor voltage, repeat steps 5) and 6). If voltage at closed throttle is not less than 2.2 volts or adjustment cannot be obtained, replace TP sensor.
Turn ignition off. Remove gauge block, jumper wire and reconnect TP sensor harness connector. Reinstall air cleaner assembly.