Don't know.... Do You?

Okay thought I would see if someone might have some ideas for me. I bought a 99 peterbilt 377 with a 3406E CAT engine serial # 1LW20391. I filled up the passenger side tank completely and was going to run on it. Switched the toggle to passenger tank and ran out of fuel within 4 miles. Got under the truck and can not find a fuel shutoff valve anywhere? There is a valve on a crossmember that has my fuel lines running into and out of it(kind of like an air valve)no shutoff. Would this valve be my problem? Maybe gummed up. Can I just take the valve off and clean it out or would I need to buy a new one? Or could it be something completly different? I am starting to notice even when I am pulling from the drivers side acts like starving for fuel. My check engine light comes on and then the truck starts to die. After she dies you can crank all day long and there just isn't any fuel. Any and all info is greatly appreciated. Thanks. Just trying to save a buck.

 

Thank you for the helpful advise. Sometimes you just have to ask for a hand. I tapped on the "splitter" valve with a hammer lightly and noticed that both my fuel tanks started going down. I had the truck running earlier and she started to try to die so tapped on the valve and she ran just fine. Thanks for the help. I will go and get a valve tomarrow and have her fixed. Thanks again.

 

Haven't been able to get to a shop as the first one is 35 miles from me. As the truck starts to die the check engine light kicks on and as soon as I tap on the splitter valve the truck runs just fine and the check engine light goes off. The whole story is as follows.... I bought the truck 3 hours away from home. Picked it up and put $250 in the passenger tank as I thought that is the tank it was pulling from. Drove about 48 miles and she died and would not fire. Realized I wasn't getting fuel so primed the filter and went on down the road about 10 miles and shut off again. This time I finally realize that I still have a full passenger tank and an empty drivers tank. Wrecker brings out 10 gallons of fuel so I can get to station. Give him $157 for his service and get another $145 worth of fuel and put into the drivers side tank as I am able to pull fuel from this tank. Get back to the house just fine. Everytime the truck was shutting off the CHECK ENGINE LIGHT WAS TRIGGERING. I am going to take the valve off tomarrow and blow it out just to see whats gummed inside. I will probably put a new one on anyways. If this fixes the problem then I will get to a shop and find out what if any codes popped up. Really want to thank everyone for the help. Much appreciated...