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2002, 530i & 3.0Si

  1. Ensure all vacuum hose connections are correct. See Figure. Remove Red vacuum hose from carburetor (throttle housing) and connect to vacuum source. Pull off and plug vacuum hose from first stage of EGR valve. Engine speed should NOT decrease.
  2. Disconnect Blue vacuum hose from second stage of EGR valve and feel for vacuum. If vacuum is present, valve is defective. With engine at idle, blow through Blue hose. Air should flow freely.
  3. Reconnect vacuum hoses and disconnect White vacuum hose from dashpot (if equipped). Turn dashpot until plunger is free of throttle lever and reconnect vacuum hose. Remove White vacuum hose from carburetor and connect to secondary venting hose and plug loose end of secondary vent hose.
  4. Start engine and detach White hose from intake manifold. A considerable speed drop must occur and Blue hose connected to EGR valve must be under vacuum. If not, replace vacuum control valve.
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