DL102 - Check For Stuck Open EGR Valve

- Key "OFF".

- Connect a hand vacuum pump to the EGR valve.

- Apply 34 kPa (10 in Hg) of vacuum to EGR valve and release. Use an inspection mirror to observe valve movement or listen for valve closing shut. Repeat several times to verify valve function. The valve may have to be removed in order to determine its condition.

- Is EGR valve stuck in the open position or not fully reseating?

Yes -- Remove and Inspect the EGR valve for signs of contamination, unusual wear, carbon deposits, binding, and other damage. Service as necessary (Use Rotunda EGR valve cleaner 021-80056 if needed). Clear continuous memory.

Rerun quick test.

No -- The "No Start" or "Stall" symptom is not due to the EGR system. Reconnect all components. Return to the appropriate Diagnostic Routine Flowchart and continue to diagnose the symptom prior to servicing the EGR Continuous DTC's.