High-Pressure Fuel Pump: Removal
NOTE:
Do not loosen any fittings or plugs on the high-pressure fuel pump.
- With the vehicle in NEUTRAL, position it on a hoist. Refer to: Jacking and Lifting .
- Remove the engine appearance cover retainers, release the engine appearance cover from the rear retaining tabs on the intake manifold, then remove the engine appearance cover.
- Release the fuel system pressure. Refer to: Fuel System Pressure Release .
- Disconnect the battery. Refer to: Battery Disconnect and Connect .
- Disconnect the high-pressure fuel pump electrical connector.
-
- Disconnect the secondary latch and position out of the way.
- Disconnect the spring lock coupling, then disconnect the high-pressure fuel pump supply line. Refer to: Spring Lock Couplings .
-
-
NOTE: To release the fuel pressure in the high-pressure fuel tube, wrap the flare nuts with a shop towel to absorb any residual fuel pressure during the loosening the flare nuts.
- Disconnect the flare nuts, then remove and discard the high-pressure fuel tube.
-
- Remove the high-pressure fuel pump bolts by alternately loosening the bolts one complete revolution at a time, then remove the high-pressure fuel pump.
- Remove and discard the high-pressure fuel pump O-ring seal.
- Remove the roller tappet.
- Inspect the roller tappet. If any flat spots or scoring are found, especially in the indicated areas, then inspect the high-pressure fuel pump and the roller tappet drive lobe. Install new components as needed.
- Remove any dirt or foreign material from the high-pressure fuel pump bolt holes.