10f. High Pressure Oil System Air Pressure Check

Note: An air leak on the high pressure oil pump shaft lip seal is normal while carrying out this procedure. This is not an indication of a high pressure oil leak and the high pressure oil pump should not be replaced for this condition. If the pump is suspect, carry out the High Pressure Oil Pump Test to verify the pump generates sufficient pressure to start the engine.

Note: The replacement parts may leak if all the surfaces are not oil saturated under system pressure and the seals are not correctly seated during installation.

Note: Never replace the high pressure oil pump until all high pressure oil system leaks have been repaired and the high pressure oil system is retested.

Note: A complaint of engine stalls followed by a crank no start while the engine is warm indicates a leak in the high pressure oil system. This may or may not be accompanied by DTCs P2290 or P2291. Follow this procedure to isolate the leak.

Note: If an intermittent no start condition or delayed ICP pressure rise during restart after a 15-minute soak exists, a small leak is suspect. Refer to the Hard Start illustration of the previous test. Remove the valve covers to inspect for leaks.

Note: Higher oil temperatures are more effective for diagnosis of high pressure oil system leaks.

Purpose:

The purpose of this test is to verify IPR valve operation and to isolate leaks in the high pressure oil system.

Recommended Procedure:

• Verify the base engine oil pressure. Refer to the Workshop Manual Section 303-01C, Engine, Inspection and Verification.
• If the engine will start, warm the engine until the EOT is greater than 80 °C (176 °F).
• For E-series vehicles, install the Adapter, High Pressure Pump Test 303-765 or equivalent by removing the test port plug on the top of the high pressure oil pump. For F-Super Duty and Excursion vehicles, install the Adapter, High Pressure Pump Test 303-765 or equivalent by removing the ICP sensor. Note: It is easier to find small leaks with higher pressure.
• Pressurize the high pressure oil system up to 1379 kPa (200 psi) using a suitable tool.
• Key ON, engine OFF.
• Using the diagnostic tool, open the IPR valve by decreasing the IPR duty cycle to 0%.
• Allow oil to drain through the IPR valve for two (2) minutes. An air leak should be heard.
• Using the diagnostic tool, close the IPR valve by increasing the IPR duty cycle to 85%.
• Listen for an air noise change.
• Use a stethoscope through the oil fill tube or left valve cover crankcase vent hole to isolate the location of the air noise change.
• Cycle the IPR valve open (IPR duty cycle 0%) and closed (IPR duty cycle 85%) as needed to help isolate the location of the air noise. An air noise at the base of the high pressure oil pump with the IPR duty cycle at 0% is normal.
• If no air noise change is heard, the IPR valve may not be functioning as commanded. GO to Pinpoint Test R to diagnose IPR circuit DTCs. If no DTCs are present and the engine will start, carry out the Injection Pressure Regulator Test in this section to verify IPR function. If the engine will not start, install a new IPR valve and repeat the air pressure check. Refer to the Workshop Manual Section 303-04C, Fuel Charging and Controls, Fuel Injection Pressure Regulator (IPR) Valve.
• If no air noise change is heard and the IPR valve has already been replaced, carry out the High Pressure Oil Pump Test in this section.
• If an air noise change is heard under a valve cover, remove the cover(s) to isolate the location of the leak. Refer to the Workshop Manual Section 303-01C, Engine, Valve Cover. Listen for leaks around the fuel injector O-Rings, stand pipes, and oil rail plugs.
• If an air noise change is heard at the back of the engine, a leak at the high pressure oil branch tube adapter or the high pressure oil branch tube is suspect. Refer to the Workshop Manual Section 303-04C, Fuel Charging and Controls, High Pressure Oil Branch Tube Adapter and High Pressure Oil Branch Tube.
• After completing all repairs, verify the high pressure oil system integrity by re-pressurizing the system and listening again for any remaining leaks while cycling the IPR valve duty cycle. Repeat the Monitor the ICP and IPR Duty Cycle While Cranking test to verify the repair

 

Well I guess I was wrong on that one.

Was that the black book or one of the blue ones?
Also is it could in the DVD?

I'll have to look tonight and see if I can pull the PDF up.


Sean

 

You could check the live feed of ours from last night. Because it shows me doing an air test and chasing the cause. The customers turbo didn't move. I did an IPR test also (behind the turbo).

 

How would I check your feed?

 

PCED (powertrain control emissions diagnosis) black book.

 

OK, Thanks
Now I know where to look in the DVD for the PDF and will see if
I can get that posted tonight.


Sean

 

All the fun little facts I found.
Here are the PDF as promised.


Sean

 

Thanks Sean. All you guys are great what a big help this site is

Thanks