EGR Backpressure Transducer: Testing and Inspection

EGR Pressure Transducer Check:

PROCEDURE
1. Remove three vacuum hoses from Exhaust Gas Recirculation (EGR) pressure transducer.
2. Place finger over EGR pressure transducer tube and blow in opposite tube. Air should pass through filter part of pressure transducer.
3. Connect vacuum pump to tube "P" and plug tube "Q" with your finger.
4. Blow air into tube "A" while applying vacuum to tube "P" at the same time. You should be able to obtain vacuum on the vacuum pump gage.
5. Stop blowing air into tube "A" and the vacuum pump gage should read zero.

^ If EGR pressure transducer fails either test, replace the pressure transducer.