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Home >> Saab >> 1989 >> 9000 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION >> Proportional EGR Valve

Proportional EGR Valve

  1. With engine at idle and at normal operating temperature, disconnect EGR valve hose at thermostatic valve. Connect vacuum pump to hose. Apply vacuum to EGR valve. Engine idle should become rough.
  2. Reconnect vacuum hose. Disconnect hose between EGR valve and throttle valve housing. Apply pressure to hose using radiator tester. Engine idle should become rough. Replace EGR valve is idle was not affected.
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