Sym RV 250i Service Manual page 272

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18. Emission Control System
Inspection Items
Secondary air injection system
1. Visually inspect the reed valve, air injection solenoid valve, and secondary air filter as well as hoses
for damage.
2. Leaking check.
3. Warm-up running check.
Evaporative Emission Control System
1. Visually inspect the activated carbon canister and hoses for damage.
2. Leaking check.
3. Function test of the purge control valve.
Catalytic converter
1. Check if exhaust gas content is within standard.
2. Remove the exhaust pipe and shake it gently for abnormal noise.
Fuel Supply System
1. Clean the air filter.
2. Check the air filter.
3. Clean the fuel injector and all circuit with air gun or specified solvent.
4. Check the fuel pump/ fuel pressure regulator for malfunction.
5. Adjust CO/HC values at idling. (engine rpm must be within specification)
Ignition system
1. Spark plug check and replacement.
2. Ignition coil check and replacement.
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