Just got the dyno finished trying to make runs with it. When everything is cold it will load up with my valve, but after a few seconds I can turn it by hand with my valve shut. It's a needle style valve. I'm thinking the valve has a built in bypass or something. But it's not loading up at all. But after I turn it off I can wait a few minutes and it will load up again. When it loads up I get pressure on my guage. Anyone else have this problem. Thanks