EGR Pressure Transducer
- Check filter for any contamination and damage. Using compressed air, clean filter. Replace filter is necessary. See Fig 1.
- Remove 3 vacuum hoses from EGR pressure transducer. Place finger over one of 2 ports on top of EGR pressure transducer and blow into opposite port. If air passes through filter part of pressure transducer, go to next step. If air does not pass through filter part, replace pressure transducer.
- Connect a hand-held vacuum pump to one of 2 ports on top of pressure transducer and plug opposite port. Blow into bottom port and apply vacuum. While blowing into bottom port, vacuum should be shown on vacuum pump gauge. Stop blowing into bottom port. Vacuum should read zero. If vacuum can not be obtained or does not release, replace EGR pressure transducer.
Courtesy of GENERAL MOTORS CORP.