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Home >> Volkswagen >> 1976 >> Rabbit Base, 2D Hatchback, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Exhaust Gas RECIRCULATION >> Testing >> Rabbit & Scirocco EGR System >> 1979 Models
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1979 Models

  1. Start and warm engine to normal operating temperature. Remove vacuum hose from distributor retard diaphragm and connect hose to EGR valve.
  2. Engine should run rough or stall if EGR valve is working properly. If engine does not respond as indicated, check for a faulty EGR valve or clogged EGR passage.
  3. Connect a vacuum gauge between EGR temperature control valve and EGR valve. With engine idling at normal operating temperature, there should be 2-4 in. Hg of vacuum. If not, replace EGR temperature control valve.
  4. Now connect a vacuum gauge between vacuum amplifier and temperature control valve. Vacuum gauge reading should be 2-4 in. Hg. If not, replace vacuum amplifier.
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