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Removal & Installation

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  1. Remove the intake manifold in order to gain access to the fuel solenoid driver. See LOWER INTAKE MANIFOLD . The fuel solenoid driver is located on the left side of the injection pump. Scribe a reference mark on the engine front cover and the injection pump housing to assist in correctly locating the injection pump during reassembly. Loosen the injection pump retaining nuts approximately 1/2 turn, using Injection Pump Wrench (J 41711). Do not remove the nuts. Rotate the pump to the passenger side of the vehicle until the pump stops, using Injection Pump Adjusting Tool (J 29872-A). Retighten the top injection pump retaining nut using injection pump wrench.
  2. Disconnect the fuel solenoid driver wiring connector at the injection pump. Loosen the four fuel solenoid driver mounting screws until the screws are free from the injection pump. Discard the heat transfer pad and the mounting screws. Remove the fuel solenoid calibrating resistor using a snap ring pliers. The calibrating resistor is located on a small circuit board which is located in the Pump Mounted Driver (PMD) connector housing and is placed over the PMD terminal pins. This calibrating resistor circuit board has two outboard holes which can be grabbed with snap ring pliers.
    3. NOTE: The calibrating resistor is specific to the injection pump. Do not damage the resistor. The calibrating resistor indication number is located on the front of the calibrating resistor. If the calibrating resistor is damaged or lost, the injection pump must be removed for replacement or taken to a Stanadyne dealer for calibration.
  3. Install the calibrating resistor in the new fuel solenoid driver using snap ring pliers. The resistor is keyed to fit in only one way. Install the resistor with an indication number facing upward. If the fuel solenoid driver calibrating resistor is missing. DTC 1218 will set.
    4. WARNING: Do not over tighten the fuel solenoid driver mounting screws. Damage to the fuel solenoid driver will result. Damage to the PMD from overtightening the mounting screws is very common.
    NOTE: The heat transfer pad is designed to transfer heat generated by the PMD to the pump housing so the heat can be dissipated. Do not install the fuel solenoid driver without a NEW heat transfer pad. The heat transfer pad is required to prevent rapid failure of the fuel solenoid driver from overheating. The heat transfer pad is not a seal or a gasket.
  4. Place the new heat transfer pad on the side of the new fuel solenoid driver and insert the four fuel solenoid driver mounting screws into the fuel solenoid driver. Align the fuel solenoid driver mounting screws with the holes in the pump housing and tighten.
  5. Connect the fuel solenoid driver wiring harness connector. Loosen the upper injection pump retaining nut approximately 1/2 turn using injection pump wrench. Do not remove the nut. Using injection pump adjusting tool, rotate the pump back to the pump's original position using the reference mark you created in step  1.
  6. To complete installation, reverse removal procedure. Tighten fasteners properly. See TORQUE SPECIFICATIONS . Perform the injection timing adjustment procedure. See INJECTION PUMP TIMING .
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