TSB 90-02-04 Deposit-Resistant Injectors
TSB 93-15-07 Deposit-Resistant Injector ID Chart
Publication Date: January 17, 1990
FORD: 1990 TAURUS, TEMPO
LINCOLN-MERCURY: 1990 CONTINENTAL, SABLE, TOPAZ
LIGHT TRUCK: 1990 BRONCO, E-150, E-250, F-150, F-250
ISSUE: Deposit resistant injectors (DRI) have two (2) unique features which are tolerant to deposit formation. The DRI's are tan in body color (not connector color) and do not require cleaning.
ACTION: No cleaning action is required for deposit resistant injectors. The two (2) unique DRI features are:
1. The Bosch (DRI) meter fuel through a 4-hole director plate.
2. The Nippondenso (DRI) allows a wider tip opening by metering the fuel upstream with an internal orifice. The wider tip allows a deposit buildup which does not affect the fuel flow and vehicle function.
NOTE: THE PINTLE-TYPE INJECTORS USED ON EARLIER MODEL YEAR CARS AND TRUCKS MAY HAVE DEPOSIT FORMATION AT THE PINTLE AND SEAT AREA. THESE PINTLE-TYPE INJECTORS ARE BLACK OR GRAY IN COLOR. THEY MUST BE CLEANED WHEN REQUIRED BECAUSE DEPOSIT BUILD-UP CAN AFFECT PERFORMANCE.
PART NUMBER PART NAME
FO3Z-9F593-A Fuel Injector (2.3L EFI)
FOSZ-9F593-A Fuel Injector (3.8L EFI)
FOTZ-9F593-A Fuel Injector (5.8L EFI)
OTHER APPLICABLE ARTICLES: 89-25-08
SUPERSEDES: 93-07-05
WARRANTY STATUS: INFORMATION ONLY
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Any single injector (MAF or bench) should measure 13-15 Ohms; a bank of 3 (6-cyl MAP) should measure 4-5 Ohms; a bank of 4 (V8 MAP) should measure 3-3.5 Ohms.
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TSB 98-09-09 NON-WARRANTY FUEL INJECTOR TESTING INFORMATION
Publication Date: MAY 11, 1998
FORD: 1992-94 TEMPO
1992-97 PROBE, THUNDERBIRD
1992-98 CROWN VICTORIA, ESCORT, MUSTANG, TAURUS
LINCOLN-MERCURY: 1992-94 TOPAZ
1992-97 COUGAR
1992-98 CONTINENTAL, GRAND MARQUIS, SABLE, TOWN CAR, TRACER
1993-98 MARK VIII
1999 COUGAR
LIGHT TRUCK: 1992-96 BRONCO
1992-97 AEROSTAR
1992-98 ECONOLINE, F-150, F-250 LD, RANGER, SUPER DUTY F SERIES
1993-98 EXPLORER
1997-98 EXPEDITION, MOUNTAINEER
1998 NAVIGATOR
ISSUE: In-vehicle testing of multi-port fuel injectors, using Rotunda Fuel Injector Tester 164-R3750, will no longer be warranty reimbursable. Lack of tester updates and improvements in the design of fuel injectors has led to the discontinuation of this Service Procedure. A significant number of warranty returned injectors test within engineering specification. All diagnostic tools and procedures are being re-evaluated for effectiveness.
ACTION: Acceptable fuel injector tests include: Service Bay Diagnostic System (SBDS) relative injector flow, fuel pressure decay, cylinder drop/balance techniques, and misfire detection tools. Using the acceptable fuel injector tests eliminates the possibility of a misdiagnosed fuel injector concern due to inaccuracy of this test equipment. Since the introduction of Deposit Resistant Injectors in 1991, lean fuel conditions caused by deposit formation have been eliminated. Diagnostic concentration is on single fuel injector inoperative concerns in a particular cylinder.
NOTE: CLEANING OF FUEL INJECTORS IS NOT WARRANTY REIMBURSABLE EXCEPT FOR THE FOLLOWING VEHICLES:
1992-96 AEROSTAR 4.0L
1992 EXPLORER 4.0L
1992 RANGER 4.0L
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: INFORMATION ONLY
For other TSBs, check
here.
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