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Home >> Peugeot >> 1982 >> 504 Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Gas RECIRCULATION >> Testing >> Vacuum Check >> EGR Throttle Flap Housing
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EGR Throttle Flap Housing

  1. Disconnect Red-ringed hose from inner electrovalve. Connect hose to a vacuum pump. Apply 2.4 in. Hg. Throttle flap control rod should begin to move.
  2. Apply vacuum until 12.6 in. Hg is reached. Throttle flap control rod should now be at end of travel. If flap does not operate properly, replace entire assembly with a new EGR throttle flap housing.
  3. With vacuum pump still connected to Red-ringed hose, remove air intake hose from throttle flap housing. Apply 12.6 in. Hg of vacuum until throttle flap reaches maximum travel.
  4. Measure distance between throttle flap and throttle flap housing. Distance must be greater than 0.18" (4.5 mm). If not, replace entire assembly with a new EGR throttle flap housing.
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