I am working on a 1948 ford 8n. Have no oil pressure. I took off the junction valve (correct name?) where oil comes from engine. When I turn engine over without plugs I get oil coming out the hole where junction goes. And when I put the line to gauge on I get oil coming out the end of that line. It doesn't shoot out but there is a pretty good flow. However, when I hook up to gauge I get no pressure. This is a new gauge. I blew compressed air into the gauge and it moved so I am assuming it is good. Any advice here would be appreciated. I am usually a John Deere man but bought this for my wife and am learning...Thanks,