My valve stopped switching from front to rear tank. I removed the valve and cleaned the inside electrical contacts. Still not switching. I replaced the tank switch in the dash. Still not switching.
Now, I believe the electric fuel pump is pulling from both tanks. Started with both tanks full...
My 4070 shows 2-3 psi with gage on filter schrader valve. Zero at exceleraion.
Replaced with a Airtex E8012S. Reads same psi.
The truck runs good.
Rick
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