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Home >> Suzuki >> 1990 >> Samurai >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Exhaust Gas RECIRCULATION (EGR) >> EGR Valve
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EGR Valve

  1. Disconnect EGR vacuum hose and attach a hand-held vacuum pump to vacuum hose port. Apply approximately 8 in. Hg to EGR valve while checking for smooth operation of diaphragm. Ensure diaphragm maintains position without loosing vacuum.
  2. With engine at idle, apply vacuum to EGR diaphragm. Engine should idle rough and/or stall. If diaphragm moves and engine RPM does not change, remove EGR valve and check for plugged passages.
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