Acura Coupes and Sedans 1986-1993 Repair Guide

General Information



See Figures 1, 2, and 3

The function of this system is to minimize the amount of fuel vapors escaping into the air. The system consists of a charcoal canister, a canister vapor purge system, tank vapor control system, and on the carbureted engine, a carburetor vapor control system. When fuel evaporates in the tank or carburetors, the vapors pass through the vent hoses to the charcoal canister where they are stored. The purge control system uses solenoid valves operated by the ECU to draw fresh air into the canister and carry the vapors into the intake manifold when the engine is running.

Charcoal Canister

A sealed, maintenance free charcoal canister is used on all vehicles and is located in the engine compartment. The fuel tank's vents lead to the canister. Fuel vapors are temporarily held in the canister's activated charcoal until they can be drawn into the intake manifold and burned in the combustion chamber.

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Fig. Fig. 1: Evaporative emission control system-Integra

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Fig. Fig. 2: Evaporative emission control system-Legend

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Fig. Fig. 3: Evaporative emission control system-Vigor