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Integral EGR BACKPRESSURE Transducer Valve

  1. Check vacuum hose routing. Disconnect EGR valve hose and connect vacuum gauge to hose. With engine warm, there should be vacuum to transducer at 3000 RPM for 2.3L engines, or kickdown RPM on all other engines. 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, about 1/16" less than I.D. Connect hand-held vacuum pump to EGR valve. Idle engine and apply vacuum gradually. EGR valve stem/diaphragm should move smoothly and engine should drop at least 100 RPM.
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