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Home >> Opel >> 1976 >> Opel Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Emissions System - Exhaust Gas RECIRCULATION >> Testing >> EGR Valve >> 1975 Models

1975 Models

  1. With engine idling at normal operating temperature, disconnect vacuum line at EGR valve. Connect a known good vacuum hose between EGR valve and intake manifold.
  2. Engine should run rough and idle drop at least 200 RPM. If not, clean EGR valve and exhaust gas recirculation passage. Repeat test procedure. If idle still does not drop, replace EGR valve.
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