Why isn’t fuel going to the carb?

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Dakota Smith

1976 340 Feather Duster
Joined
Feb 17, 2018
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I have replaced the fuel tank, sending unit, fuel lines, hoses, and the fuel pump, but fuel still isn’t going to the carburetor. Any suggestions?
 
No gas?
A hand vacuum pump to pull up the fuel through pump bay be all you need. Or a little bump of air into filler neck with a blow gun and a rag.
If pump makes vacuum and all the fittings are tight,there is no reason it shouldnt get fuel to carb.
 
to answer your question with the information provided would be futile at best .
 
Carb float stuck? Wack the carb with a hammer.Listen for float to drop.
 
Hammer handle. Never hit carb with a hammer. Unless its a tapometer(small one)
Ya I should have been a little more specific. I assume people have common sense. Probably aint the problem anyway. I'm sure the OP has checked with the fuel line disconnected.
 
There's another post about this as well. Are you using an aftermarket sending unit? If so, while the tank was out, did you look through the filler neck hole to see if the pickup tube on the sending unit is reaching all the way to the bottom of the tank?
 
My uncle had a Chevy truck. Driving down the raod, it died. Got it home and wasn't getting any fuel to the carb. Pull the fuel pump, replaced it and still no fuel. My dad looks in at the dash and says "Is your gauge working"?. Uncle says "Yeah, why?". Its on empty.

Watching 1 of these car shows and after putting the car together wouldn't start. Everything hooked up, 5 gallons of fuel, still no start. Turned out they had the line from the tank to the outlet and the outlet hooked to the tank side.
 
Got a hell of a deal on a duel tank chevy with a no fuel to carb condition. Some one had replaced the transfer solenoid with a tee. One tank was dry. It just sucked air till I put fuel in the other tank. Made a killing on that flip.
 
I have replaced the fuel tank, sending unit, fuel lines, hoses, and the fuel pump, but fuel still isn’t going to the carburetor. Any suggestions?
You may have a short pickup tube in the tank, add more fuel to submerge the end of the tube.
 
You may have a short pickup tube in the tank, add more fuel to submerge the end of the tube.
I`m wondering what kind of fuel pump he`s using. Did I miss it ? Did he check the new pick up assembly to make sure it was not plugged ? Most new elec. pumps that I have bought over the years,are plugged some way or another too.
 
Just asking you, did you fill the new tank a 1/4 to a 1/2 with gas? First I would verify that the fuel was getting to the fuel pump, disconnect the gas tank fuel line to the pump, put a piece of hose on it and suck on it to see if you get fuel ( I know you will get a mouth full of gas if it is not clogged) then you will know if the sender is the problem or not. Next connect the fuel line from the tank back on the fuel pump and disconnect the carb fuel line and add a piece of hose to it, put it in a can and try turning the motor over to see if the pump is working, (did you add a fuel fliter and is it connected the right way) that way you will know if the pump is working and fuel is getting to the carb.
 
Not to get textbook, but you should tee in a fuel pressure tester. (excuse this if you already know this) When the tank is dry, or the car is out of gas, it loses prime, you can drain the battery cranking it until it regains prime again. (By prime, I mean the fuel lines are full of gas all the way up to the fuel bowl, think of it as air in the system like bleeding brakes) What I do to re prime a carbureted car that is out of gas is, I make sure there is gas in the tank, then drip a small amount in the carb, enough to fire the engine. the engine running at RPM makes the fuel pump work alot better than cranking. If you are sure there is gas in the tank, fire the engine over a couple of times untill the lines prime up.
 
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Do these hoses look like they’re hooked up correctly? Gas is getting to the fuel pump, but isn’t going to the carb for some reason. There wasn’t any instructions with my fuel filter and there wasn’t any hoses when I started the project, so I may have put the hoses on wrong. What do you think?
 
The "flow" arrow is pointing toward the Carb, then yes its hooked up correctly. I have never seen a filter with T hookup like that. What is the purpose of that?
 
Go to Wal Mart and pick up a Fram plastic See through filter, put it on and lose that "Tee" filter. Then you will be able to see gas in the filter. It could be a bad defective filter, i have seen that before. In the meanwhile crank the car a few seconds pull the pump side of the hose at filter and see if gas squirts out under pressure.
 
Once you get that all sorted out. Re-rout your fuel line to between the alternator and the water pump with metal toward the carb then go to rubber for the filter and carb. That's how the factory did it. I guess you could use a plastic filter for diagnostic reasons but I would not use one personally.
 
The "flow" arrow is pointing toward the Carb, then yes its hooked up correctly. I have never seen a filter with T hookup like that. What is the purpose of that?
It’s for wher the return line hooks to. Where else would the return line go?
 
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