bwilhite1
Member
- Joined
- May 14, 2015
- Posts
- 39
- Reaction score
- 8
- Location
- al
- First Name
- bruce
- Truck Year
- 1986
- Truck Model
- k10
- Engine Size
- 350
Guys,
Please double check my thinking here. I've reviewed the service manual and done a search here. Thinking I might have a bad Pollack valve.
Here's the background:
My 86 K10 won't feed from the left tank, but works fine from the aux tank. It doesn't quit when you switch tanks, it just seems like it doesn't switch tanks. The tank selector switch is new, and I can hear the motor on the selector valve being actuated when I switch from L/R tank and vice versa. The electric motor does sound different depending on which tank you choose. I've just swapped the sending unit in the left tank and fuel indications seem to be accurate when I flip the switch. The left tank is empty and the aux tank is full.
Yesterday, I ran the truck using the aux tank and had the left fuel hoses unplugged, but sending unit plugged in and grounded. I switched to the left tank and nothing happened. The truck kept running for about 2-3 minutes until I turned off the key. I revved it lightly to help it burn the fuel in the line and also put my finger over the disconnected fuel lines and didn't feel any suction. I would have let it go longer, but didn't want things to get too hot with me crawling around underneath it.
My question is....does it sound like a bad selector valve or did I just not let it run long enough to quit? I assumed it would starve itself of fuel pretty quickly. I took the cover off of the selector valve, but haven't checked the power supply, although I assume it's good since I can hear the electric motor with the truck off. That selector valve looks like a bear to change and I wanted to get someone's opinion that has a little more experience.
Thanks.
Please double check my thinking here. I've reviewed the service manual and done a search here. Thinking I might have a bad Pollack valve.
Here's the background:
My 86 K10 won't feed from the left tank, but works fine from the aux tank. It doesn't quit when you switch tanks, it just seems like it doesn't switch tanks. The tank selector switch is new, and I can hear the motor on the selector valve being actuated when I switch from L/R tank and vice versa. The electric motor does sound different depending on which tank you choose. I've just swapped the sending unit in the left tank and fuel indications seem to be accurate when I flip the switch. The left tank is empty and the aux tank is full.
Yesterday, I ran the truck using the aux tank and had the left fuel hoses unplugged, but sending unit plugged in and grounded. I switched to the left tank and nothing happened. The truck kept running for about 2-3 minutes until I turned off the key. I revved it lightly to help it burn the fuel in the line and also put my finger over the disconnected fuel lines and didn't feel any suction. I would have let it go longer, but didn't want things to get too hot with me crawling around underneath it.
My question is....does it sound like a bad selector valve or did I just not let it run long enough to quit? I assumed it would starve itself of fuel pretty quickly. I took the cover off of the selector valve, but haven't checked the power supply, although I assume it's good since I can hear the electric motor with the truck off. That selector valve looks like a bear to change and I wanted to get someone's opinion that has a little more experience.
Thanks.