EGR Backpressure Transducer: Testing and Inspection

Comp. Loc:

PROCEDURE
1. Check filter for contamination and damage. Use compressed air to clean filter.
2. Remove the three vacuum hoses from the Exhaust Gas Recirculation (EGR) pressure transducer.
3. Place finger over EGR pressure transducer tube and blow air into opposite tube. Air should pass through filter part of pressure transducer.
4. Connect a vacuum pump to tube "P" and plug tube "Q" with your finger.
5. 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 gauge.
6. Stop blowing air into tube "A" and the vacuum pump gauge should read zero.

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