Ever since it has been on the road I have been having trouble with the rear fuel tank and the engine starving when using it.
The tank is quite shallow and flat and the fuel pick up is at the front (terrible design) so when the fuel is getting low it all surges to the back and the pick up is dry. Similarly when the tank is full and i go up a long hill, it also starves, I put this down to the distance from the engine to the tank, right at the back. The two factory tanks are under the driver and passenger seats.
All of the tanks feed directly to the engine through 2, 6-way solenoid valves and a couple of toggle switches on the dash.
I see a couple of solutions, one is to have a transfer pump to transfer fuel from the rear tank to one of the fronts, I would also need to install a fuel return line between the two to stop the front tank being overfilled. This makes the rear tank a holding tank.
The second option is again have a 2nd fuel pump but this time also install a small surge tank (i have a spare one from another project) in the engine bay. This would be fed from whichever tank was selected at the time using the existing set up and should be enough to stop the fuel starvation through surge (low tank) and too much head/distance (hills)
Thoughts on either of these? Any other ideas I might have overlooked?