Engine - Rough Idle or Stumble

Article No.
93-11-4

05/26/93

^ FUEL INJECTORS - NON-DEPOSIT RESISTANT TYPE - DEPOSIT FORMATION

^ IDLE - ROUGH - LEAN FUEL FLOW CAUSED BY FUEL INJECTOR PINTLE DEPOSIT FORMATION

^ STUMBLE - LEAN FUEL FLOW CAUSED BY FUEL INJECTOR PINTLE DEPOSIT FORMATION

FORD:
1988-90 TAURUS, TEMPO
1988-91 MUSTANG

LINCOLN-MERCURY:
1988-89 CONTINENTAL
1988-90 SABLE, TOPAZ
1988-91 MARK VII

LIGHT TRUCK:
1985-91 BRONCO, ECONOLINE, F-150-350 SERIES
1988-91 F-47, F-53

This TSB article is being republished in its entirety to correct the part number for the 7.5L engine injector assembly.

ISSUE:
A stumble or rough idle condition may be caused by lean fuel flow resulting from pintle deposit formation on non-deposit resistant fuel injectors. These non-deposit resistant fuel injectors are susceptible to pintle deposit formation.





ACTION:
If service is required, install deposit resistant injectors. These Deposit Resistant Injectors (DRI'S) are acceptable service replacements for non-deposit resistant injectors that exhibit lean fuel flow. Refer to the DRI Replacement Chart for correct parts usage.





Parts Block

NOTE:
FUEL INJECTOR REPLACEMENT IS ONLY ALLOWED WHEN LEAN FLOW IS VERIFIED BY UTILIZING THE SERVICE BAY DIAGNOSTIC SYSTEM (SBDS) OR ROTUNDA FUEL INJECTOR CLEANER (113-0001).

SUPERSEDES:
92-24-5

WARRANTY STATUS:
Eligible Under Bumper To Bumper Warranty Coverage For 1991 Lincolns, Basic Warranty Coverage, Emissions Warranty Coverage





LABOR OPERATION TIME

DEALER CODING
BASIC PART NO. CONDITION CODE
9F593 49

OASIS CODES:
404000, 608000, 608400, 611000, 611500