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.
Fuel Evaporation System: Description
Fuel evaporation system prevents escape of raw fuel vapor to atmosphere. Components of system include a fuel tank with integral vapor separator, a check and cut valve (3-way valve on 626), purge control valves, a charcoal canister, a fuel filler cap, a water thermo valve on 626, and connecting lines and hoses.
Additional components include, a 3-way solenoid valve on 626 (2 on 323), and an Emission Control Unit (ECU).
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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