OK I think I get you, I went on the Wagner website and read their FAQ section as well... Come to think of it that could explain why I did have difficulty getting my 360 to idle low enough (it would still run with the idle speed screw/throttle plates all the way closed) and I couldn't get rid of an annoying slight surge at idle regardless of initial timing, idle mixture, RPM etc. almost like it had a persistent vacuum leak. Which it probably did, in a way... holy cow it all makes sense now!! lol
