Lol one 6 gallon tank?? That’s about 30 mins of hard running lol. But I understand what your saying, process of elimination if it runs good off of a known good 6 gallon tank then the issue lies in the other tanks, connectors or hoses. I’m gonna try the new connectors from my engine to my 12 gallon tank (there is no quick connect at the tank it’s hard piped) and see what that does thanks for the help and opinions