FixVault

EGR System Check: Notes

  1. Disconnect the vacuum hose from the EGR solenoid.
  2. Regarding the engine in cold and hot conditions, check the condition of vacuum when a rapid racing has been performed by opening the throttle valve quickly.
    Fig 1: Disconnecting Vacuum Hose From EGR Solenoid
    G03876354Courtesy of KIA MOTORS AMERICA, INC.

    WHEN ENGINE IS COLD 

    NORMAL VACUUM CONDITION

    Throttle valve Normal vacuum condition
    Open quickly No vacuum will generate (Remained as barometric pressure).

    WHEN ENGINE IS HOT 

    NORMAL VACUUM CONDITION

    Throttle valve Normal vacuum condition
    Open quickly It will momentarily rise over 13 kPa (3.9 in.Hg)
  3. Disconnect the three-way terminal.
  4. Connect the hand vacuum pump directly to the EGR valve.
  5. Check whether the engine stalls or the idling is unstable when a vacuum of 29 kPa (8.7 in.Hg) or higher is applied during idling.