Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2-Tube Canister
Gasoline vapors from fuel tank flow into canister and are absorbed by carbon. Canister is purged when engine is running above idle speed.
A timed vacuum source is applied to canister to draw fresh air through bottom of canister. See Figure . Fresh air mixes with fuel vapors and are drawn into intake manifold to be burned in engine.
Some models are equipped with a second canister purge hose. This hose is connected to a Canister Control Valve (CCV). CCV is then connected to carburetor bowl vent line.
This allows carburetor bowl to be vented to canister, through CCV, when engine is not running. These vapors are then drawn into intake manifold once engine is started.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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