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Home >> Subaru >> 1991 >> XT Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR) >> EGR Valve
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EGR Valve

  1. Look through opening in EGR valve body. Warm engine to normal operating temperature. Increase engine speed and check if valve shaft moves when engine reaches 3500-4000 RPM under no-load condition.
  2. If shaft does not move, remove valve and manually check valve movement. If valve appears okay, check vacuum lines for leaks. If valve does not operate, clean or replace.
    NOTE: When cleaning EGR valve, DO NOT wash in solvent or degreaser, or permanent damage to the valve diaphragm will result.
  3. Depress valve diaphragm and inspect valve seat area. Inspect valve inlet and outlet for deposits and clean as necessary. Blow clean with compressed air. Recheck valve operation by applying 8 in. Hg with a hand vacuum pump. Install unit using a new gasket.
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