Drivers side tank doesnt work

[staggerd86c-10]

I currently havent driven my truck in a while but while I have the switch on the passenger side tank the truck runs perfect, as soon as I switch to the drivers side tank the fuel pressure drops and the truck shuts off, so something is wrong. You think it can be something as easy as a kinked fuel line? My selector valve and switch are new and it worked up until I stopped driving the truck, could it have to do with the vent for the gas tank? Thanks ahead of time guys
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[tucsonjwt]

When you switch on the malfunctioning tank, can you hear the valve motor sound and see the fuel gauge react to the level of fuel in that tank? I would verify level of fuel in malfunctioning tank and check for leaks.

[355bullet]

so how can you tell if its the switch or selector valve? mine dont work at all on the passenger side.

[wyattglock]

Originally Posted by 355bullet

so how can you tell if its the switch or selector valve? mine dont work at all on the passenger side.

The easiest way I have found to verify the valve is good, is to get under the truck and have someone else operate the switch. You should hear the motor in the valve running.
I also had a bad switch in the dash, it would just make intermittent contact and short out the circuit when I used it. Yours is probably the type of switch that says Depress Fully at the bottom of it, if so, that is a momentary style switch that makes contact to switch the sending unit since your truck has the block mounted fuel pump.