Charcoal Canister
When engine is not running, vapor caused by expanding fuel in fuel tank collects in fuel vapor separator. Fuel which condenses in fuel vapor separator returns to fuel tank. Fuel vapor flows from fuel vapor separator and into charcoal canister where it is contained by activated charcoal. When engine is started, ported vacuum causes fresh air to be drawn in through bottom of canister. This pulls stored fuel vapor into the combustion chamber for burning.
Vacuum switching valve allows purge to occur only under the following conditions:
- Coolant temperature greater than 140°F (60°C)
- Engine speed greater than 1500 RPM
- Throttle switch off (Not idling)
- When engine is under load.