Propane Quick Connect

Just taking a stab at your problem-----I think the regulator for the rv is a lp or low pressure reg. Your cooker needs high pressure. When I was getting my Open Range set up like I wanted it I was suspicious of that quick connect. Sure enough I had just enough flame to burn your hand, not boil seafood for sure. All I did was make up a quick connect for my fish cooker that I can mate to the onboard tanks. That way I do not have to take an extra lp cylinder everywhere I go. I have 3 -20 lb cylinders and I just use them. Rig up a hose like that and I think your problem will be solved.