EGR Backpressure Transducer: Testing and Inspection

PROCEDURE
1. Check the filter for any 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 one finger over the EGR pressure transducer tube.
4. Blow air into the opposite tube. Air should pass through the filter part of the pressure transducer.
5. Connect a vacuum pump to tube P and plug tube Q with your finger.
6. 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.
7. Stop blowing air into tube A. The vacuum pump gauge should read zero.
- Replace the EGR pressure transducer if it fails either test.