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Article No. 98-23-13	HESITATION/STUMBLE - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO IDLE - ROUGH - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO LACK OF POWER/POOR PERFORMANCE - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO STALLS - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO OIL - EXCESSIVE OIL CONSUMPTION - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO
Publication Date: NOVEMBER 10, 1998

ISSUE:

On vehicles with a 7.3L direct injection (DI) turbo diesel engine, one or more of the following concerns may be present:

• Rough Idle
• Stalling
• Hesitation/Stumble
• Loss/Lack of Power
• Poor Fuel Economy
• Excessive Oil Consumption

These concerns may be caused by the injector cushion O-rings deteriorating, resulting in a poor seal.  This condition cannot be detected with conventional diagnostics (i.e., it will not produce diagnostic codes with either Super Star or New Generation Star Testes).

ACTION:

Remove the injectors, check for deterioration of the cushion O-ring.  If necessary, replace the O-ring with a new O-ring which has a more robust design and should not deteriorate under severe conditions.  Refer to the following Service Procedure for details.

SERVICE PROCEDURE

1. If no Diagnostic Trouble Codes (DTCs) are found and normal diagnostics do not lead to a solution, remove the injectors according to the DI Turbo Service Manual.
2. Check for wear or deterioration of the cushion O-ring.  If excessive wear is found, replace the O-ring with a new blue O-ring found in the O-ring Kit (F8TZ-9229-AA).  Refer to the Instruction Sheet included in the kit.

   NOTE:

   IF ONE O-RING IS REPLACED ALL O-RINGS AND SEALS MUST BE REPLACED.  IF ONE INJECTOR SEAL IS SERVICED ALL THE INJECTOR O-RINGS AND SEALS MUST BE SERVICED.

   The O-ring Kit includes the following:

   • One (1) Upper Backup Ring
   • One (1) Upper Cushion Ring
   • One (1) Upper Injector Seal
   • One (1) Seal
   • One (1) Lower Injector Seal
   • One (1) Injector Gasket
   • One (1) Instruction Sheet

OTHER APPLICABLE ARTICLES:

NONE

SUPERCEDES:

98-17-19

WARRANTY STATUS:

Eligible Under the Provisions Of Bumper To Bumper Warranty Coverage, Emissions Warranty Coverage, And Powerstroke Diesel Engine Warranty Coverage

DEALER CODING

OASIS CODES:

401000, 607000, 607400, 608000, 608400, 610000, 610500, 611000, 611500, 614000, 614500