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Home >> Volkswagen >> 1976 >> Rabbit Base, 4D Hatchback, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Exhaust Gas RECIRCULATION >> Testing >> Rabbit & Scirocco EGR System >> 1975-77 Models
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1975-77 Models

  1. Check vacuum hoses for damage and proper routing. Start and warm engine to normal operating temperature. To test first stage of EGR valve, temporarily connect vacuum hose from anti-backfire valve to EGR valve. Engine should run rough or stall. If not, check for a faulty EGR valve or clogged EGR passage.
  2. To test full load enrichment switch on California models, connect an ohmmeter to switch terminals (ignition off). Close throttle valve and check that ohmmeter reads infinity.
  3. Press accelerator pedal to floor. Just before pedal reaches floored position, ohmmeter reading should change to zero (0) ohms. If not, adjust switch by loosening retaining screws. Tighten screws and check switch for proper operation.
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