Checking Condition

Engine coolant temperature: 80~95 °C (176~205 °F)

1. Disconnect the vacuum hose from the throttle body EVAP Canister purge hose fitting and connect a vacuum pump.
   Fig 1: Testing EVAP Canister Purge Port Vacuum

   Courtesy of KIA MOTORS AMERICA, INC.
2. Start the engine and check to see that, after increasing the engine speed, vacuum rises fairly constantly.
   NOTE: If there is no vacuum, it is possible that the throttle body port may be restricted and may require cleaning.

Fig 2: Canister Purge Port Vacuum-To-Engine Speed Graph

Courtesy of KIA MOTORS AMERICA, INC.