EXPERTEC TSB (51-65-13)

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

SMU - SECTIONS 3 & 6E3 - DRIVEABILITY & EMISSIONS

Model(s): 1992-95 Chevrolet and GMC Truck S/T, M/L Models

1992-94 Oldsmobile Bravada with 4.3L Engine (VIN W - RPO L35) Models

Bulletin No.: Chevrolet 51-65-13, Oldsmobile 51-65-13, GMC 51-65-13

Date: 03/14/1995

SERVICE INFORMATION

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) 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.