Hello I just purchased a 1993 Ford F-150 rear wheel drive 5.0 about two weeks ago. It has 120,000 miles on it. Fuel injected. It has duel fuel tanks on it and whenever I run the back tank gas comes out of front tank fill neck. I have tried to look it up online. There are plenty of forums talking about the same issue and how Ford had a recall to add check valves to the fuel pumps. With that being said I don’t know which pump to purchase to remedy my truck. Or is there a way I can add a check valve to the line somewhere or just bypass my front tank altogether? I can’t seem to find a direct answer anywhere.
Also the truck does not want to stay at idle and it shut off while I was driving (only about 2 miles). I’ve been told to adjust the throttle or to change spark plugs. I’m definitely not a mechanic and any help is very much appreciated. Thank you.
I had the same problem on my 1994 F-150. You need to replace the fuel pump on your front tank. The valve to keep the rear pump from filling the front tank is integral to the pump. Having to splice the wires in the tank was pretty scary though. Nothing exploded when I ran the pump, so I must have done it right.
It's either that or stop using your rear tank.
Thank you for the information. Any ideas on why it isn’t idling properly and how to fix it?