My 89 f250 is having a fuel issue. I can't use my front tank for fuel so when I am running on the rear tank it also pumps fuel to the front tank when in use. I think it is the tank switching valve that might be bad. I had to much fuel in the front so while on the rear tank it pumped fuel to the front and caused it to overflow. If this is the problem where can I find this part? Any thoughts? Thanks

 

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