E 350 Van V8-7.3L DSL Turbo VIN F (1995)
Oil Pump: Technical Service Bulletins
Engine - Poor Idle and/or Low Output
Article No.
03-21-4
10/06/03
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DRIVEABILITY - ROUGH IDLE - DAMAGED OIL
PICK-UP OR DAMAGED 0-RING SEAL - VEHICLES
WITH 7.3L DI TURBO DIESEL
^
ENGINE - LOW OUTPUT - DAMAGED OIL PICK-UP
OR DAMAGED/MISSING 0-RING SEAL - VEHICLES
WITH 7.3L DI TURBO DIESEL
FORD:
1994-1995 F SUPER DUTY, F-250, F-350
1995 E-350
Article 95-10-7 is being republished in its entirety as part of a consolidated 7.3L diagnostic aid booklet.
ISSUE
Some vehicles may exhibit a poor idle quality and/or low output after the engine returns to idle speed. This may be caused by a damaged oil pick-up tube
assembly or a missing or damaged 0-ring seal on the oil pick-up tube causing high Injection Control Pressures (ICPs).
ACTION
If high ICPs are encountered, refer to the following Diagnostic Procedure to determine the cause of the concern.
DIAGNOSTIC PROCEDURE
1.
Complete all the steps in the 1994-1/2 or 1995 DI Turbo Diesel Diagnostic Guide. Repair any problems which may exist that are not ICP related
before proceeding with this procedure.
2.
Verify the vehicle has oil with the correct specification and the correct oil level. If the oil quality or service interval is unknown, change the oil and
fill with oil of known specification. If the concern still exists, continue with this procedure.
WARNING
BE SURE THE VEHICLE IS IN "PARK" OR "NEUTRAL" WITH THE PARKING BRAKE APPLIED FOR THE REST OF THIS
PROCEDURE.
3.
While the engine is idling, note the ICP reading on Rotunda New Generation Star (NGS) Tester (007-00500) or the ICP voltage at the Breakout
Box (014-00950104-pin, 014-00322 60-pin).
4.
Accelerate the engine to 3300 rpm. If the engine is unable to reach 3300 rpm, this is the result of another failure. Repair this condition before
proceeding with this procedure.
5.
ICP readings which increase above 1250 psi (1.75 volts) within 15 seconds may be caused by air being drawn into the high pressure oil system.
6.
Add an additional 2.8 L (3 qt) of oil to the crankcase (raising the oil level to 16 L (17 qt)).
7.
Raise the rear axle of the vehicle so the rear tires are approximately 10" off the ground to fully submerge the pickup tube.
8.
Accelerate the engine to 3300 rpm and monitor the ICP readings or ICP voltage. If the ICP readings now stay below 1250 psi (1.75 volts), then
there is a failure of the oil pick-up tube assembly.
9.
Remove the oil pan per the appropriate Service Manual.
10.
Remove the oil pick-up tube and inspect for damaged or missing 0-ring. Inspect the tube assembly for possible damage or cracks.
11.
Replace any defective parts as necessary.
12.
Fill the crankcase to the proper level (13.2 L (14 qt)), and retest the system to verify the ICP readings are now within specifications.
