EGR Backpressure Transducer: Testing and Inspection

NOTE: Be sure to perform the "EGR System Functional Inspection" before performing the following test.
Testing and Inspection


1. DISCONNECT VACUUM HOSES FROM EGR VACUUM MODULATOR
2. INSPECT EGR VACUUM MODULATOR OPERATION



- Block ports P and R with your finger.
- Blow air into port Q.
- Check that the air passes through to the air filter side freely.
- Start the engine, and maintain speed at 3,500 rpm.



- Repeat the above test.
- Check that there is a strong resistance to air flow.
3. RECONNECT VACUUM HOSES TO EGR VACUUM MODULATOR