Hi Zuk, get yourself some soapy water in a spray bottle and go over all connections and joints to the intake manifold. Air leak into the manifold will cause the engine to idle faster. When you spray over the area that is leaking you will notice a difference in the running of the engine. Also check the PCV valve by crimping the air line from it to the manifold. Do the same to all other hoses leading from external components to the manifold. If there is a leak at an external component there will be a difference in the running of the engine when you isolate the line to a faulty component.