EGR System Check

EGR SYSTEM CHECK
1. Disconnect the vacuum hose from the EGR solenoid, and then connect a hand vacuum pump via the three-way terminal.
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.

When engine is cold




[Engine coolant temperature: 20 °C (68 °C) or less]

When engine is hot




[Engine coolant temperature: 80 °C (176 °C) or higher]

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.