Exhaust Gas RECIRCULATION (EGR) System Test: Notes

NOTE: EGR systems contain different components depending on application. See Figure and Figure. When testing EGR system and components, use proper illustration to determine component location.

NOTE: When performing EGR system test, it will be necessary to monitor engine RPM by using tachometer or scan tester depending on model application. For tachometer or scan tester connections, see IDLE SPEED & MIXTURE in the ADJUSTMENTS article.