matt_spitfire Posted April 14, 2018 Share Posted April 14, 2018 4agze gurus: Anyone have any idea what may be causing this sound? It’s coming from the intake manifold on a ae101 4agze map model engine. Sounds like a pipe trying to suck up fluid.. please note engine always has an air filter on it just removed to record the video. Only makes the noise on idle after cold start knocks off. Seems to disappear when’s revs are on an comes back when revs drop. video: https://youtu.be/_u0iICeAu_c Quote Link to comment Share on other sites More sharing options...
matt_spitfire Posted April 22, 2018 Author Share Posted April 22, 2018 Problem solved, excess vacuum inside the intake manifold. 1 Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted April 23, 2018 Share Posted April 23, 2018 How do you get excess vacuum? Quote Link to comment Share on other sites More sharing options...
bigfoot Posted April 23, 2018 Share Posted April 23, 2018 1 hour ago, Seedy Al said: How do you get excess vacuum? Not enough boost? 1 Quote Link to comment Share on other sites More sharing options...
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