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1972-74 All Models

WARNING: This page does not describe the selected car, but rather 125 other vehicles, including the 2010 Volkswagen Routan, 2009 Volkswagen Routan, 2002 Volkswagen Cabrio, 2001 Volkswagen Cabrio, and 2000 Volkswagen EuroVan. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure ambient temperature is greater than 65°F (18°C). Run engine at idle speed and alternately move throttle valve from idle to partial load positions. When doing this, an audible sound should be heard from the electromagnetic cut-off valve.
  2. Disconnect vacuum hose from EGR valve and plug hose. Apply vacuum to EGR valve. Engine should run rough or stall. If EGR valve functions as described, system is functioning properly.
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