hi, i have a 86 302 fi , with dual tanks my rear tank has a whole in it i so dont put fuel in it , now the problem is when i fill by saddle tank, or even with a half tank , the fuel is somehow getting pushed back to that rear tank so im pissing out almost 4.00 dollar fuel, i dont know how it;s happening and is there a way to keep the fuel from reaching that rear tank ?
thanks
Dave

 

do a search, its been beat to death many of times. its usually the tank selector on the frame.

 

It's funny that the selector valves on these trucks are starting to malfunction at around the same time frame isn't it?