Exhaust Gas Recirculation System (EGR)

Fig. 20 EGR system operation.:

1. Make a thorough visual check of system, wiping away oil as necessary to facilitate inspection. Replace any cracked or broken hoses and ensure all electrical connectors are securely connected.
2. With engine off, check EGR control valve for any indication of binding or sticking by moving diaphragm of control valve upward with finger.
3. Start engine and ensure EGR system operates as indicated in Fig. 20.