Got it solved.
To answer your question though, I have two pumps, one for each tank. One is the original stock one in stock tank. Second is inline between aux tank and switching valve.
Problem ended up being a misprint in the included instructions for the valve. It power to the...
installing an auxiliary tank in my rock crawler. so i bought a 6 port fuel selector valve. after hooking it up the aux side works as it should. when i switch it back to the main tank, it runs out of fuel and dies. I can disconnect it all and go back to just the original system set up and the...