EGR Modulator

EGR Pressure Transducer Filter:

1. Inspect filter for contamination and damage (clean filter, using compressed air.)






2. Remove EGR modulator and plug nozzle with your finger. Blow air into another nozzle and check that air passes through to air filter side.






3. Connect vacuum pump to nozzle "P" and plug nozzle "Q" with your finger. While blowing air into nozzle "A," operate vacuum pump and check that vacuum is applied to modulator.

4. If the modulator fails any of the previous tests, then it is defective and should be replaced. After replacement perform the test again to verify the repair.