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: Connecting Vacuum Pump

   Courtesy of HYUNDAI MOTOR CO.
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: Vacuum/Engine Speed Graph

   Courtesy of HYUNDAI MOTOR CO.