Yes That Was My First Instinct Too,so Then I Sprayed Carb. Cleaner On Every Gasket,fitting,and Possible Place That Air Could Get In To The Intake All The Way To The Haed I Have Taken Every Hose,bellow.piece Of Rubber Off And Inspected Or Replaced It Too. Now I Am Pounding My Head Against Everything To Try To Figure This Out! I Beleive That It Is Going To Be So Simple That I Will Throw Every Tool I Have Out Side And Go Back To Simpler Things! What Ever Happened To Good Old Carb, Days?