October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
EGR Valve: Impulse
- Depress diaphragm with finger to verify smooth operation. With engine running, check if engine idling becomes rough when EGR valve is forced open.
- To test EGR valve for leakage, disconnect valve piping at exhaust manifold. Check if engine idling becomes smooth. If valve leakage is observed, EGR valve replacement is necessary.