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Wiring Diagrams

Engine Mechanical, Chassis
& Electrical

  • Domestic Auto
  • Domestic Truck
  • Import Auto & Truck
  • Engine Performance

    EXHAUST EMISSION SYSTEMS
    1966-74 Domestic Cars

    This section describes the factory installed systems for exhaust emission control on all car models and includes service procedures and adjustments for each car.

    All Models

    Air Injection

    American Motors & Jeep

    1966-74 Exhaust Emission Tune-Up

    1970 Deceleration Valve

    1973-74 Electric Assist Choke

    1973 Exhaust Gas Recirculation

    1974 Exhaust Gas Recirculation

    1969-74 Thermostatic Air Cleaner

    1971-73 Transmission Controlled Spark

    1974 Transmission Controlled Spark

    1973 Vacuum Diagrams

    1974 Vacuum Diagrams

    Chrysler

    1966-74 Exhaust Emission Tune-up

    1969 Anti-Icing Device

    1970-71 Distributor Modulator

    1972-74 Distributor Solenoid

    1966-69 Distributor Vacuum Control Valve

    1973-74 Electric Assist Choke

    1972-74 Exhaust Gas Recirculation

    1973-74 OSAC Valve

    1971-72 NOx System

    1970-74 Thermostatic Air Cleaner

    1971-74 Thermal Ignition Control

    Vacuum Diagrams

    Ford

    1966-74 Exhaust Emission Tune-up

    1971-74 Decel Valve

    1971-73 Distributor Vacuum Deceleration Valve

    1968-74 Distributor Vacuum Control Valve (PVS)

    1968-74 Dual Diaphragm Vacuum Advance Units

    1973-74 Electric Assist Choke

    1970-71 Electronic Distributor Modulator

    1972-73 Electronic Control Spark

    1973 Exhaust Gas Recirculation

    1974 Exhaust Gas Recirculation

    1973-74 Spark Delay Valve

    1972-73 Staged Choke Pulldown

    1973 Temperature Activated Vacuum

    1974 Cold Temperature Activated Vacuum

    1968-74 Thermostatic Air Cleaner

    1972-73 Transmission Regulated Spark

    1968-69 Vacuum Diagrams

    1970-72 Vacuum Diagrams

    1973 Vacuum Diagrams

    1974 Vacuum Diagrams

    General Motors

    1966-74 Exhaust Emission Tune-up

    Buick

    Cadillac

    Chevrolet

    Oldsmobile

    Pontiac

    1968-74 GM Controlled Combustion System

    1972-74 GM Exhaust Gas Recirculation

    1968-74 GM Thermac Air Cleaner

    GM Vacuum Diagrams

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