1997 Inspection / Maintenance Emissions Diagnostic Manual
Pre-OBDII
For all GM Passenger Cars and Light Duty Trucks Pre-OBDII
This manual provides emission diagnostic information applicable to
open and closed loop carbureted, throttle body injection (TBI),
multiport fuel injection (MFI), and the major emission
control systems found on General Motors Vehicles. The procedures outlined in the
manual, as well as the procedures, referenced in the applicable vehicle
service manuals, apply to both the Basic and Enhanced
Inspection/Maintenance (I/M) programs. An understanding of the material presented in this
manual, along with the diagnostic and repair procedures presented in the
applicable vehicle service manuals, and the appropriate Dealer Technical Service
Bulletins, will assist service technicians with diagnosing and servicing
vehicles with excessive tailpipe and EVAP system emissions.
Covers Vehicles Made by:
- Chevrolet
- Pontiac
- Oldsmobile
- Buick
- Cadillac
- GMC
- Canadian GM
Contents:
- Inspection / Maintenance (I/M) Programs
- Engine Emissions and Emission Control Strategies
- Inspection / Maintenance (I/M) Strategy Based
Diagnostics
- Closed Loop Carbureted Emissions Diagnosis
- Closed Loop TBI Emissions Diagnosis
- Closed Loop MFI Emissions Diagnosis
- Open Loop Carbureted Emisssions Diagnosis
- EVAP Emissions Control System Diagnosis
- Compressed Natural Gas Vehicle Procedures
- Reference
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