Chrysler DODGE D150 1993 Service Manual page 940

• FUEL SYSTEM 14 - 121
Fig. 49 Throttle Position Sensor (TPS) Testing
(4) With the fuel injection pump throttle lever con­
tacting the low idle speed screw (Fig. 50), TPS output
should be 1 volt or slightly above. If not, the TPS
must be adjusted.
(5) The TPS nylon adapter (Fig. 51) is machined to
accept a 10 MM open end wrench. To adjust, gently
rotate the nylon adapter with a 10 MM open end
wrench to until correct voltage is obtained.
J9114-261
Fig. 50 Throttle Lever Contacting Low Idle Speed
Screw
(6) Open throttle to the wide open position. The
spring load breakover lever should have moved off
the stop and rest against the breakover spring (Fig.
52). If not, the throttle actuation rod must be ad­
justed before adjusting TPS. Refer to Accelerator
Pedal and Throttle Cable section of Group 14, Fuel
Systems.
(7) With throttle held in wide open position, check
TPS output voltage. It should be 2.25 to 2.75 volts
higher t h a n the output voltage is at closed throttle
position. If not, gently rotate nylon adapter to obtain
correct voltage.
Fig. 51 Adjusting Throttle Position Sensor
Fig. 52 Correct Breakover Spring Position
WATER-IN-FUEL SENSOR
REMOVAL
(1) Remove fuel/water separator filter. Refer to Fu­
el/Water Separator Filter Removal.
(2) Remove the square cut O-ring from the filter
connector at the bottom of the fuel heater (Fig. 53).
(3) Drain the fuel/water separator filter. Remove
the water-in-fuel sensor, O-ring and fuel/water drain
valve assembly from separator filter (Fig. 53).
INSTALLATION
(1) Apply a light film of clean engine oil to sealing
surface of WIF sensor.
(2) Install WIF sensor into new fuel/water separa­
tor filter.
(3) Fill separator filter with clean fresh fuel.
(4) Apply a light film of clean engine oil to sealing
surface of separator filter.
(5) Install a new square cut O-ring to the filter
connector on the bottom of the fuel heater.