Purge Port Vacuum Inspection

PURGE PORT VACUUM INSPECTION
Perform test with Engine coolant temperature: 80-95°C (176-203°F)
1. Disconnect the vacuum hose from the throttle body purge hose nipple and connect a hand vacuum pump to the nipple.




2. Start the engine and check to see that, after raising the engine speed by racing the engine, vacuum raises proportionately with the rise in engine speed.

NOTE: If there is a problem with the change in vacuum, it is possible that the throttle body port may be clogged and require cleaning.