Toyota 77740-60014 CANISTER Assembly, Charcoal

First of all, the evaporative emissions control system's role is to store fuel vapors from the gas tank in a charcoal canister and route them to the intake manifold. A strong fuel odor in the engine compartment often indicates a fault in this system. If detected, inspect the charcoal canister and hose connections for cracks and damage. Check the canister and hoses for deterioration.

This system is committed to collect and retain those fuel which vaporize from the fuel tank, throttle body, as well as intake manifold, so that hydrocarbon emission cannot be discharged into the air. The EVAP system consists of a canister with charcoal, connected hoses, Temperature Vacuum Valve, Vacuum Control Valve, Vacuum Switching Valve, and a check valve. Carbonated fuels are contained in the canister when the engine is not on and is released in combustion when the engine is on. The new charcoal canister has the check valve with three check balls that open and close the passagages depending on the fuel tank pressure and running conditions. Some of the problems include poor idle, stalling and driveability problems which may be as a result of an in-operative check valve, damaged canister or faulty hoses. There might be smells of fuel or any form of fuel loss, and this may be as a result of fuel lines or the canister and so there is need to check for eased or cracked hoses. Any leakage of fuel in the canister has to be replaced, or if the filter is blocked or the check valve stuck, one should check if there is airflow in the canister. The proper functioning of the Temperature Vacuum Valve should be confirmed with the help of checking the air flow at various temperatures of the engine and replace it if required. For canister replacement, there is the need to remove the vacuum hoses and label them, remove the mounting bolts of some canister models and disconnect other hoses and for the new canister put it in a reverse order.