Hombre S Regular Cab 4WD V6-4.3L (1999)
Technical Service Bulletin # SB02-02-S002
Date: 020401
Campaign - Fuel Injection System Warranty Extension
TSB SB02-02-S002
Sequential Central Port Fuel Injector (SCPI) Warranty Extension for California Vehicles
ISSUE DATE: APRIL, 2002
Affected Vehicles
1997-2000 Hombre (TH) with 4.3L V-6 engines that are currently registered in California Only with California Emissions.
Service Information
Condition:
Some owners of 1997-2000 Hombre (TH) models, that are registered in California, equipped with 4.3L V6 engines, may experience a "Service Engine
Soon" light, misfire, rough idle or hard start due to a deposit build-up on the Sequential Central Port Fuel Injector (SCPI) poppet valve(s). The deposit
build-up may cause injector poppets to stick closed. Fuels used in California have been found to interact with the SCPI system to cause the deposits.
Possible Cause:
A deposit build-up on the CSFI poppet valve ball and/or seat may cause the poppet ball to stick open or closed. In either case, the specific cylinder will
be mis-fueled resulting in a cylinder mis-fire condition.
Correction:
To correct this condition, follow the procedures in this Technical Service Bulletin for cleaning and servicing injector(s) to restore poppet valves to an "as
new condition". Injector replacement should NOT be considered as a correction for this customer concern.
The first step in this process is to make sure that the poppets are operational. The cleaning procedure will be ineffective on a poppet nozzle that is stuck
closed. The J44466-10 Pressure Regulator/Hose Assembly attached to a nitrogen tank, should provide the required high pressure (150 psi) source to
perform the unsticking procedure.
The J39021 Fuel Injector Tester and accessories provide the means to "energize" the injector. Some later model year vehicles may utilize the Tech 2 to
"energize" the injectors.
The second step of this process is to run the engine on a solution of 5% Top Engine Cleaner and 95% gasoline. This will effectively clean any deposits
from the ball and seats of the poppets.
IMPORTANT:
It is very important that the engine fuel system is separated from the vehicle fuel system. Top Engine Cleaner may have detrimental effects on the
fuel pump.
Repair Time Requirements
According to the terms of the agreement American Isuzu Motors Inc and the dealer have 45 days from the date the customer first brings the vehicle in to
resolve the customers claim for repair under this warranty. If you decide to refuse a customers claim for repair under this warranty
because you suspect accidental damage, tampering, or lack of proper maintenance, notify the National Owner Relations Department immediately at
1-800-255-6727. This will allow us to thoroughly investigate the customers claim within the 45 day timeline.
Owner Notification
American Isuzu Motors Inc (AIMI) will send the initial notification letter to the owners of affected vehicles notifying them of the terms of the warranty
extension (See Copy). The initial letter will be mailed out on March 19, 2002.
