Fuel Accumulator: Service and Repair
REMOVAL1. Fuel system pressure release must be performed prior to service. Service and Repair
Ignition Coil Packs:
2. Disconnect the DIS coil pack electrical connector.
3. Remove the 4 DIS coil pack mounting bolts and remove the coil pack from the engine.
4. Disconnect the fuel return line Quick-Connect fuel fitting by pushing in on the black retainer ring located at the end of the fitting. Slide fuel fitting off of the chassis fuel tube.
WARNING: Wrap the fuel lines with a shop towel so that any spilled fuel will be absorbed.
Coolant Temperature Sensor (View With Coil Removed):
5. Disconnect coolant temperature sensor electrical connector.
Fuel Pressure Dampener:
6. Remove the fuel rail retainer bracket screw.
7. Using two open-end wrenches, one on the fuel rail hex and the other on the return tube nut, loosen the tube nut. (If two wrenches aren't used, damage will occur to the fuel rail tubes.
WARNING: Place a shop towel around the fuel pressure dampener so that any spilled fuel will be absorbed.
8. Remove fuel pressure dampener.
INSTALLATION
1. Insert the fuel return tube nut into the fuel rail hex and tighten finger tight.
Fuel Pressure Dampener:
2. Insert the fuel rail return tube into the fuel rail retainer bracket. Torque the retainer bracket screw to 35 lb-in (4 Nm).
3. Torque the fuel return tube nut to 250 lb-in (28 Nm).
NOTE: Use two wrenches to tighten the fuel return tube nut, one to hold the fuel rail hex and the other to tighten the fuel return tube nut.
Coolant Temperature Sensor (View With Coil Removed):
4. Connect the coolant temperature sensor electrical connector.
5. Install the DIS coil pack and torque the 4 mounting bolts to 105 lb-in (12 Nm).
6. Connect the DIS coil pack electrical connector.
7. Connect the Quick-Connect fuel fitting to the fuel return line chassis tube.
8. Perform fuel system leak test. [1][2]Fuel Pressure Leak Down Test