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Home >> Peugeot >> 1981 >> 504 Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Gas RECIRCULATION >> Testing >> Vacuum Check >> EGR Valve

EGR Valve

  1. To test upper chamber, disconnect green ringed hose from outer electrovalve and connect it to a vacuum pump. Apply 2.4 in. Hg; the diaphragm should start to move. Apply vacuum until 11.8 in. Hg is reached. Diaphragm should now have reached its end of travel.
  2. If diaphragm does not operate properly, then remove, clean, and reinstall EGR valve. Repeat step  1). If diaphragm still does not function properly, replace EGR valve.
  3. To test lower chamber, repeat steps  1) and  2), but substitute blue ringed hose from middle electrovalve in place of green ringed hose.
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