Diesel Engine - Hesitates/Stalls/Lack of Power/Stumbles

Article No.
98-23-13

11/23/98

^ 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 0-RINGS -
7.3L DI TURBO

^ OIL - EXCESSIVE OIL CONSUMPTION - POOR SEAL
ON INJECTOR O-RINGS - 7.3L DI TURBO

LIGHT TRUCK:
1994-97 F SUPER DUTY
1994-98 F-250 HD, F-350
1995-98 ECONOLINE

This TSB article is being republished in its entirety to include vehicles through the 1998 model year.

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 0-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 Testers).

ACTION
Remove the injectors, check for deterioration of the cushion 0-ring. If necessary, replace the 0-ring with a new 0-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 0-ring. If excessive wear is found, replace the 0-ring with a new blue 0-ring found in the 0-ring kit (F8TZ-9229-AA). Refer to the Instruction Sheet included in the kit.

NOTE
IF ONE 0-RING IS REPLACED ALL 0-RINGS AND SEALS MUST BE REPLACED. IF ONE INJECTOR SEAL IS SERVICED ALL THE INJECTOR 0-RINGS AND SEALS MUST BE SERVICED.

The 0-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

PART NUMBER PART NAME

F8TZ-S229-A 0-Ring kit

OTHER APPLICABLE ARTICLES: NONE

SUPERSEDES: 98-17-19

WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage, Emissions Warranty Coverage, And Powerstroke Diesel Engine Warranty Coverage

OPERATION DESCRIPTION TIME

982313A Replace Injector 0-rings - 5.2 Hrs.
F-Series

982313B Replace Injector 0-rings- 4.9 Hrs.
Econoline

DEALER CODING
CONDITION
BASIC PART NO. CODE
9A288 D8

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