IPR And High Pressure Pump Test
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2005 Ford RV Cutaway, 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
To prevent engine damage, do not over-tighten the high-pressure tube assembly fitting. Refer to FUEL CHARGING & CONTROLS - 6.0L DIESEL
.
- Install the ICP sensor or fill port plug removed during high pressure oil rail test.
- Remove the IPR valve. Inspect the IPR valve screen for damage or foreign matter. Remove the foreign matter as necessary. Install a new high pressure pump if the IPR valve screen is damaged.
- Remove the high pressure pump cover. Refer to FUEL CHARGING & CONTROLS - 6.0L DIESEL .
- Install the IPR valve and connect the IPR valve connector.
- Remove the plug from the top of the high pressure pump.
- Install the Adapter, High Pressure Rail Test 303-766 or equivalent in place of the plug.
- Slowly apply regulated shop-air pressure to the high pressure pump, using the Adapter, High Pressure Rail Test 303-766 or equivalent.
- Using the diagnostic tool, close the IPR valve by increasing the IPR duty cycle. Check the high pressure pump for leaks.
- Inspect the discharge tube, quick connect joint and the high pressure oil branch tube for damage. If no leaks are found and the engine has correct oil flow, install a new high pressure pump.
- If the leak is isolated to the branch tube quick connect fitting, install a new quick connect fitting and a new branch tube.