Hi all. I bought an E500 about a year ago, known trans shudder but got it cheap with thought of someday fixing. Anyway, had a full tank of fuel when I bought it. Thought it weird stayed on half a tank a good while until it died on the road. Put a gallon of gas in it and drove home. It did show empty right after that but went back to half tank. I put $20 of fuel in and stayed half tank. Few months later, finally fooling with it. I took left pump cover off, looked at float, nothing abnormal looking. Hardly any fuel in left side. Took right pump cover off. Half to nearly 3/4 full of fuel I guess. Float looked normal. Put back together, now fuel gauge say empty with the fuel light on. When running with the right pump holddown cover off, return fuel is pouring out of lines on top of the right pump. Took right pump hose off and cranked eng. Fuel is coming out of pump. So I am way confused. The fuel goes from right pump, internal to the left pump then to eng? How does fuel get to the left side of tank and how does it control that to make the fuel even on both sides which it isn't? I watched some video on YT and it looked like the return line is split off into three and one goes to the left side and two to the right?? I would think the float reading on the left side saying half full would stop fuel from being pumped into it but I can't see any thing that controls that. I don't have access to a wiring diag or shop manual. If one side empty, does it just take time to level buth sides out??

HELP!!
Thanks, Jeff