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Home >> Saab >> 1986 >> 900 S, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> EGR System >> Testing >> EGR System

EGR System

  1. Run engine at normal operating temperature. Connect a tachometer to engine. Slowly raise engine speed, at note RPM at which valve begins to open. The valve spindle is visible between valve casting and valve bellows.
  2. On Turbo models, the valve should open at 2300-2900 RPM. On all other models, valve should begin to open at 1900 RPM. If necessary, check EGR valve and thermostatic valve.
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