oldbetsy

This is my first time trying this here is my current problem when I run on my front tank it continues to draw fuel from my rear tank but if Im on the rear it only pulls from the rear any ideas is there a tank selector valve and if so were would I find it?

94Bronc

i'd check out your switch and make sure its not sending power to both first

oldbetsy

How do I go about doing that can I check it at the switch or do I have to try and check at the pumps?

Just call me Sean

iTrader: (1)

Check it at the switch. How do you know it's pulling from both? Many of these trucks pump fuel back to the wrong tank, but not draw from both.

94Bronc

take the switch out, check continuity from the power receiving side to each sending side, if it has continuity from one to both, then its bad. it should have continuity from the receiving to ONE of the sending sides at a time

*edit* if your truck has a third pump(i dont know which model years did and didnt) then there might be another pin that has power ALL the time on the sending side, but i'd assume the frame pump wouldnt go through the switch

oldbetsy

I checked it at the switch and it seams to be functioning corectly it seams that even when the front tank is out of gas that it will continue to run with the switch still on the front position.

ymeski56

Here,,,,,,,,,,,,,,,,,,,,,,........................ . I figure you must be out of them!

flareside_thunder

Tank selector valve, mounted on the driveside framerail.

oldbetsy

Thanks for all your help. I will give that a try.

Just call me Sean

iTrader: (1)

'94 doesn't have a tank selector valve.

These trucks also have a problem with the fuel level sending units so the gas gauge doesn't read right. Maybe you just have more gas than you thought.