SMU - SECTION 6E3 - DRIVEABILITY & EMISSIONS. Chevrolet Cavalier 1995

SUBJECT: SERVICE MANUAL UPDATE-SECTION 6E3-DRIVEABILITY AND EMISSIONS REVISED DTCS P0300, P0301, P0302, P0303 AND P0304

MODELS: 1995 CHEVROLET CAVALIER 1995 PONTIAC SUNFIRE WITH 2.3L ENGINE (VIN D-RPO LD2)

THIS REVISED INFORMATION, UPDATES THE FOLLOWING DIAGNOSTIC TROUBLE CODES (DTCS): P0300-RANDOM/MULTIPLE MISFIRE DETECTED, PAGES 6E3-A-98 AND 6E3-A-100 P0301-CYLINDER 1 MISFIRE DETECTED, PAGES 6E3-A-103 AND 6E3-A-105 P0302-CYLINDER 2 MISFIRE DETECTED, PAGES 6E3-A-108 AND 6E3-A-110 P0303-CYLINDER 3 MISFIRE DETECTED, PAGES 6E3-A-113 AND 6E3-A-115 P0304-CYLINDER 4 MISFIRE DETECTED, PAGES 6E3-A-118 AND 6E3-A-120

* THESE DTCS MAY BE READ ON A SCAN TOOL BUT WILL NOT ILLUMINATE THE MALFUNCTION INDICATOR LAMP (MIL).

* STEP #6 FOR DIAGNOSTIC TROUBLE CODE (DTC) TABLE P0300 SHOULD BE CHANGED TO READ:

ROAD TEST THE VEHICLE UNDER VARIOUS VEHICLE SPEEDS, ENGINE RPM'S AND ENGINE LOADS WHILE VIEWING THE SCAN TOOL'S CURRENT MISFIRE COUNTERS SCREEN FOR CYLINDERS #1, #2, #3 AND #4. DO ANY OF THE CURRENT MISFIRE COUNTERS INCREMENT?

* STEP #6 FOR DIAGNOSTIC TROUBLE CODE (DTC) TABLES P0301, P0302, P0303 AND P0304 SHOULD BE CHANGED TO READ:

ROAD TEST THE VEHICLE UNDER VARIOUS VEHICLE SPEEDS, ENGINE RPM'S AND ENGINE LOADS WHILE VIEWING THE SCAN TOOL'S CURRENT MISFIRE COUNTER SCREEN FOR THE RELATED CYLINDER. DO ANY OF THE CURRENT MISFIRE COUNTERS INCREMENT?

FIGURES: 00 ATTACHMENTS: 00

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.