Purge Port Vacuum

PRECONDITION ENGINE
Run the engine until the engine coolant temperature reaches 80-95°C (176-205°F).

VACUUM TEST





1. Disconnect the vacuum hose from the throttle body purge hose fitting and connect a hand vacuum pump to the fitting.





2. Start the engine and check to see that, after increasing the engine speed, 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.