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Home >> Volkswagen >> 1992 >> Passat CL, 2.0 B, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR)
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Exhaust Gas RECIRCULATION (EGR)

  1. With engine idling, apply about 12 in. Hg to EGR valve with a hand-held vacuum pump. Engine should run rough or stall. If idle does not change, remove EGR valve and inspect for restricted port passage. Clean as required.
  2. If port is clean, apply about 12 in. Hg to EGR valve with vacuum pump. If valve does not move, replace EGR valve. If valve moves, go to next step.
  3. Install EGR valve and new gasket. Connect vacuum gauge to EGR vacuum line with a "T" fitting. Start engine and increase engine speed to about 3000 RPM, vacuum should be present. If gauge does not indicate vacuum, vacuum source is plugged. Repair as necessary and repeat test.
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