I'm using a Mallory 4302 adjustable fuel log, it regulates the pressure after carb. It had a port for fuel gauge located at the beginning of log right before the carb. The gauge shows 13 psi and doesn't change psi at all when I mess with the set screw that is sopposed to regulate the pressure. Is the thing not working right or am I missing something here? Correct me if I'm wrong but if the pressure was truly that high wouldn't fuel be overflowing into the carb?