Component Tests
Checking1. Disconnect the vacuum hose (red stripe) from the throttle body, and connect a vacuum pump to the vacuum hose
2. Check the following points when the engine is cold (engine coolant temperature 60°C [140°F] or below) and when it is warm (engine coolant temperature 70°C [158°F] or.higher).
When engine is cold
When engine is warm
Inspection
1. Look for loose connections, sharp bends or damage to the fuel vapor lines.
2. Look for distortion, cracks or fuel leakage.
3. After removing the EVAP canister, inspect for cracks or damage.
EVAP CANISTER PURGE PORT VACUUM
Inspection
Engine coolant temperature : 80 - 95°C (176-205°F)
1. Disconnect the vacuum hose from the intake manifold purge hose nipple and connect a hand vacuum pump to the nipple.
Purge Port Vacuum Curve:
2. Start the engine and check that, after raising the engine speed by racing the engine, vacuum remains fairly constant.
NOTE: If there is no vacuum created, it is possible that the intake manifold port may be clogged and require cleaning.