7.3L Diesel Engines
- Install scan tester and enter Key On Engine Off (KOEO) self-test while holding throttle in Wide Open Throttle (WOT) position. After last service code has been displayed, remain in self-test. Place a 0.515" (13.08 mm) Gauge Block (T83T-7B200-AH) between fuel pump lever travel screw and gauge boss. See Fig 1.
Courtesy of FORD MOTOR CO.
- Cycle Overdrive Cancel Switch (OCS) once. Observe Self-Test Output (STO) on scan tester for the following conditions:
- Constant tone, solid light, or STO LO readout indicates throttle position sensor is within range. Cycle OCS to exit test.
- Fast beeping tone, flashing light, or STO LO erratic readout (4 per second) indicates throttle position sensor requires adjustment.
- Slow beeping tone, flashing light, or STO LO erratic readout (one per second) indicates throttle position sensor requires adjustment.
- No tone, solid light, or STO LO readout indicates throttle position sensor may have worn internal components. Check by trying to move sensor.
- If FIPL sensor and bracket screws are tight and there are no signs of wear between mounted parts, loosen FIPL sensor attachment screws. See Fig 2. Rotate sensor one way or the other until a constant tone, solid light, or STO LO readout is obtained. Tighten FIPL sensor attachment screws. Remove gauge block. Cycle throttle lever to WOT 5 times. Reinsert gauge block to verify setting.
Courtesy of FORD MOTOR CO.