EGR System Operation Check
- Warm engine to operating temperature. Check condition of all EGR system tubes, hoses and electrical connections.
- Start engine. Snap throttle to 2000-2800 RPM and check for EGR valve stem movement. If EGR stem moves, proceed to EGR GAS FLOW TEST. If no stem movement occurs, see TESTS W/CODES - 3.0L article in the ENGINE PERFORMANCE section for further testing procedures.