Fuel problems with 1983 C10 w/ 350 and dual tanks

[Cadcom]

I'm greasy, sore, whipped and pissed. I have a 1983 C120 Chevy OU with a 350 and dual tanks. The truck was not getting any fuel. Could squirt some into the carb and it fires right up and runs fine for a min. I removed the fuel line and squirted more fuel in, fired up and no gas flowing out the fuel line. Flipped the switch over to the other tank, still no gas pumping out. So I assumed it was a bad fuel pump (I have no idea how old the one on it was) I installed a new NAPA pump, nothing - same problem as with the old pump. So then I figured it may be an issue with the tank selector valve switch. Since it looked original to the truck I decided to change it and replace all the old rubber lines that connected it to the tanks and pump. Did all that and I still get no fuel flowing to the carb! I'm to old and fat to keep rolling around under this thing and my 15 yr old is busy learning all the new cuss words he recently acquired and isn't much help. Any ideas? Thoughts? Prayers?

 

[rumrunner55]

Sure it’s not just a fuse or relay?

 

[41mag]

Crossover switch. Probably under dash.
if unsure, look it up.

 

[harrycalahan]

Is there gas in the tanks???

 

[Cadcom]

Sure it’s not just a fuse or relay?

It's a mechanical fuel pump.

 

[Cadcom]

Is there gas in the tanks???

Yes. Had dropped both tanks, cleaned them out and replaced the fuel sending units. Both showed empty and the needle has moved up as we added gas to each tank.

 

[Cadcom]

Crossover switch. Probably under dash.
if unsure, look it up.

Replaced that as well - forgot to mention in the original post. You can hear the switch buzz and the gas needle moves as it's flipped between tanks.

 

[41mag]

It's a mechanical fuel pump.

It should have an electrical crossover switch. When you depress the switch and hold it down for a second or two, do you hear the hum of the crossover ?

 

[41mag]

Replaced that as well - forgot to mention in the original post. You can hear the switch buzz and the gas needle moves as it's flipped between tanks.

Got ya…..lol. Posted other above at same time , lol.

 

[Cadcom]

Got ya…..lol. Posted other above at same time , lol.

Yeah we have pulled all the old junk out and replaced it with nice, new, made in China junk. All that's left is the original metal lines. I guess that's the last place to check.