Exhaust Gas Recirculation System Check

1. Disconnect the vacuum hose (green striped) from the exhaust gas recirculation (EGR) valve, 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.
3. Disconnect the three-way terminal.
4. Connect the hand vacuum pump directly to the exhaust gas recirculation (EGR) valve.
5. Check whether the engine stalls or the idling is unstable when a vacuum of 200 mmHg (7.9 in.Hg) or higher is applied during idling.