Fuel issue

[polish85]

Merry Christmas everyone!!!!

ive been rebuilding my jeep for 3 years now and finally got to the point where ive attempted to crank it. The issue im having is that i can't get the fuel to get to the carb. I haven't attempted to spray some starter fluid in the carb yet but is on the list to do today after work. Everything is new on the jeep so im not sure why its not pulling any fuel from the tank. I have an eletric choke on the carb so im not sure if that has something to do with it as well.

Need a list of possible reasons this problem is occuring so i can attempt to fix this asap! so close to getting it to move and yet i cant start it!!!!! driving me crazy looking at this expensive paper weight!

Thanks in advance!

 

[Torxhead]

There is a possibility that you have a crack(s) in the fuel line between the gas tank and the pump. Especially if any of the rubber lines have not been replaced, although it is possible for a crack in the hard line also. I would suggest first trying to siphon fuel up to the pump first. If you open the fuel filler cap, siphon fuel to the pump inlet line, it should run out without any issue. Then hook the line up and crank the engine over and verify fuel to the carb.

 

[Posi]

"I was typing while Torx was posting."
Don't take this the wrong way, is there at least a half tank of fuel?
Do you have a mechanical fuel pump?
Do you have a vented cap?
If so, and all parts are new, I would start at the tank feed line and check for any holes, a pinched line, or loose hose clamps (sucking air). Check from the tank feed to the fuel pump.

 

[polish85]

Thanks for the info. About to head home and check these things. I also dont have at least a half a tank. I put in 2 gallons but have another 4 on standby. Do I need to dump that much more into it? Spoke to a mechanic and said that 2 should be plenty but maybe not??

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[polish85]

No rubber line. I have 1 hard line. The clamp at the fuel tank is old as can be and so is the little rubber line that connects the hard line with the tank. I will check both shortly.

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[Lumpy Grits]

How do you KNOW fuel isn't get'n to the carb?
Is the carb's bowl empty?

LG

 

[Peanut Butter]

Check for fuel at the fuel filter. Seams like the easiest first place to start, then work your way forward or reverse.

 

[hdgapeach]

If you still don't get gas to the carb after adding more in the tank, you could disconnect the supply line from the fuel pump just to see if gas made it to the pump. The fitting and line should get wet if you have fuel up the line that far.

If you have gas to the fuel pump, pull the oil dip stick and smell the oil on the end. If it smells of gasoline, the fuel pump diaphragm has cracked and the fuel is going into the oil pan. New fuel pump and an oil & filter change should get the fuel moving on up the line to the carb. If the fuel pump has been unused for three years, the diaphragm could be dry rotted and cracked.

If the line doesn't wet up when you take it loose, your problem is between the tank and the fuel pump (clogged line, pick up tube bent, pick up tube sock folded over, kinked / cracked rubber line, etc.)

 

[Strike]

If you're certain you're not getting fuel at the carb I'd start with the pump personally. It's an easy check and easy to perform more diagnosis while you're there. Disconnect the short rubber hose from the hard line to the pump inlet. If there's no fuel there have someone crank it while you put your thumb over the inlet of the pump. If you feel the pump sucking on your thumb then you know there's an air leak or blockage in the hard line and/or rubber hose between the pump and the sending unit. Track it down from there.

 

[Flex BT]

To make sure you know, it will take many, many cranks to get fuel from an empty line all the way to the carb. Prob way more than you would expect. I'd definitely start out trying to see if the motor cranks with a spray of starter fluid, and if it won't get any fuel after much cranking, DC the line past the pump and put it in an empty container, see if any fuel is getting pumped out. Also make sure your fuel filter isn't upside-down.

If you futz'd with the charcoal canister you may also have vacuum issues. You can try removing the gas cap if you think that might be a problem.

 

[Hedgehog]

Try not to do it all in one fell swoop. Turn it over for say a count of ten. Stop. Do it again. Stop ..... ..... .... Keeps the heat down in the coils and switch.