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EGR Function Testing - Ford - Trucks: Overhaul Ford Excursion I

Emission Applications ~107 words

Integral Backpressure Transducer Assembly

  1. Check vacuum hose routing. Disconnect EGR valve hose, and connect vacuum gauge to hose. With engine warm, vacuum to EGR valve should exist at 2000-3000 RPM. If vacuum does not exist, check vacuum lines from EGR valve to source.
  2. Clamp a plug (freeze plug may be used) into end of tailpipe; plug should be about 1/16" less than I.D. Connect vacuum pump to EGR valve. DO NOT disconnect transducer from EGR valve.
  3. Idle engine and gradually apply 6-10 in. Hg. EGR valve stem/diaphragm should move smoothly and engine speed should drop at least 100 RPM.

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