hopefully , one of you can chime in. This is in regards to filling my fuel filters before changing- obviously, I would like to fill with "filtered" diesel, so here was the idea mentioned- use the injector return line, and fill canister, and fill filter. ok, on the injector, there is a hose in the center, that gets fed from the injector return lines. For some odd reason, I dont see a "return" line in my burb. Anyways, can I disconnect form the injector return, and fill from there? is air a possible contamination point?