I last year bought a Cardone points dizzy for my 440. It came with a new vacuum canister. My 440 was not running as well so I decided to do a tune up. Just to be methodical I pulled a vacuum on the canister and it was like sucking on a straw without any Liquid . I saved my old dizzy and put that canister in and all was well. But when I tried to find a new or used one ,,there weren't to be found. I called Cardone because it was under warranty but they wanted the whole thing back. I tried to buy the canister directly from them but could not. Weird