LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1982 >> Magnavan Automatic Trans, Trans Mfr CD 400/M40 >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (EGR Function Testing - General Motors Cars) >> EGR Function Testing - General Motors Cars >> Test 1 >> Ported EGR Valve

Ported EGR Valve

WARNING: This page does not describe the selected car, but rather 1107 other vehicles, including the 2018 Chevrolet Malibu, 2017 Chevrolet Malibu, 2011 Cadillac DTS, 2011 Buick Lucerne, and 2010 Pontiac G6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect EGR vacuum hose at vacuum signal tube. Connect a hand-held vacuum pump to vacuum signal tube and apply 10 in. Hg. EGR diaphragm plate should move up and remain up for at least 20 seconds.
  2. If diaphragm moves up and holds for 20 seconds, diaphragm is operating properly. If diaphragm does not hold vacuum, EGR valve is defective. Place transmission in Park or Neutral and start engine.
  3. With engine running at normal operating temperature, push up on diaphragm. Engine RPM should decrease. If RPM decreases, EGR valve is functioning properly. Connect vacuum gauge to EGR valve vacuum supply hose. Raise engine speed to 2000 RPM and ensure adequate vacuum supply to EGR valve exists.
scientia non olet · About LEMON Manuals