Astro Van M V6-262 4.3L VIN W CPI (1992)
Fuel Injector: All Technical Service Bulletins
Manual Update - Revised Poppet Nozzle Diagnosis
File In Section: 6E - Engine Fuel & Emission
Bulletin No.: 51-65-13
Date: March, 1995
SUBJECT:
Sections 3 and 6E3 - Driveability and Emissions - Revised Chart A-7 Poppet Nozzle Diagnosis, Under Circuit Description
MODELS:
1992-95 Chevrolet and GMC Truck S/T, M/L Models
1992-94 Oldsmobile Bravada
with 4.3L Engine (VIN W - RPO L35)
This bulletin contains revisions to:
1992 Oldsmobile/Bravada Service Manual, Page 6E3-A-30
1993 Oldsmobile/Bravada Service Manual, Page 6E3-A-34
1992 Light Duty Trucks Fuel and Emissions, Page 3-60
1993 Light Duty Trucks Fuel and Emissions, Page 3D
1994 S/T Truck Service Manual Supplement (with RPO CTF) Page 3A-30
1994 Driveability Emissions and Electrical Diagnosis Manuals, S/T Page 3A-52, M/L Page 3A-36
1995 Driveability Emissions and Electrical Diagnosis Manuals, S/T Page 3A-50, M/L Page 3A-30
THE TEXT UNDER CIRCUIT DESCRIPTION SHOULD READ:
The injector tester is used to turn "ON" the injector and open the poppet nozzles for a precise amount of time, thus spraying a measured amount of fuel
into the manifold. This causes a drop in fuel pressure that we can record and compare to the pressure drop specification. An injector/poppet nozzle that
drops to less than or equal to 275 kPa (39 psi) is considered faulty.
