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1988-94 All Models Except Diesel

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. Operate engine at idle speed. Using a hand-held vacuum pump, apply 12 in. Hg to EGR valve. Engine should run rough or stall. If engine does not run rough or stall, check EGR valve pintle for movement. If EGR pintle is moving, EGR port is plugged. If EGR valve does not function, replace EGR valve.
  2. To check EGR port vacuum supply, connect vacuum gauge to EGR vacuum line using a "T" fitting. Start engine and increase engine speed to about 3000 RPM. Vacuum gauge should indicate vacuum. If vacuum is not present, vacuum source is plugged. Repair as necessary and repeat test.
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