2011 Peterbilt 389 fuel won’t stay equal

[Ben50291]

Ok guys. Here's the update. I crawled under the truck again I unhooked the fuel lines. The splitter valves are brand new draw and return. The fuel lines are brand new with no obstruction and no kinks or breaks. The draw tubes are steel inside the tank and are not blocked or cracked. I also have restriction valves that I can adjust installed on top of tanks for the return lines. It had not been drawing at all on passenger side tank which is a120vs driver side is an 80. I am going for a 1 day run tomorrow and I'll let you know if the truck starts to draw on passenger side now. Thanks for all your suggestions, i appreciate it