Re: treadle vac

Posted by HH56 On 2016/8/13 16:01:56

It might be the check valve but since it still does it when you are using what is in the reserve canister I wonder. The check valve should remain tightly closed when the engine is not running and there is no manifold vacuum to pull it open.

I would wonder if one of the poppet valves in the booster section is acting up and not opening or closing smoothly.