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Starving for fuel
Topic Started: Sep 19 2012, 05:57 PM (1,882 Views)
binthere
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Had a few days off with company!!

Okay, here's where were at now!!
Cleaned the small amont of debris from the fuel well. Then took the float off and pulled the needle valve out, and covered the inlet fitting with a paper towel to see what came out when I blew from the float side out through the inlet fitting. There was a realy small piece of some kind of pipe dope that the mechanic used on the fitting, about the size of two pinheads. I then put the carb back together.
I siphoned the gas from the tank and pulled the line off. Disconnected the line from the filter before the fuel pump, and blew it out with compressed air. Refilled the tank and connected the carb. When I tried to start it, it started right up and ran nice for about 10 minutes, so decided that I would drive around the yard for awhile. Several trips around (about 10 blocks), it was still running nice so decided to go down the road!! Big mistake! Walked home again.
Whith the jeep back in the shop, Disconnected the fuel line from the carb, and hooked a line on to the line from the pump to the carb, and pummped into a can. It took 40 seconds to pump about 10 oz. And no I dont have a vacuum/pressure gauge, but might be able to borrow one from my neighbor.
Next I pulled the top off the carb and there was only 3/4 inch gas in the fuel well again!!

Still stummped!!
somedays your the windsheild--somedays your the bug

Chuck - Cherryville B.C. Canada


53 3b [0IIIII0] stock except for wheel's and seats " a fistfull of dollars"
49 willys jeepster " a few dollars more"
and a few other retirement toys
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Lawrence
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Maybe the gas cap is not venting properly and is causing a vacuum.
This could be the reason for low fuel in carburetor.
When you disconnect the fuel line vacuum is lost so fuel will flow freely.
My two cents!

Lawrence
1955 CJ3B
Family Tradition
Decatur, AL
~~"Seen it all, done it all, can't remember most of it"~~
~~"We cannot direct the winds but we can adjust our sails"~~
http://cj3b.info/Owners/Wade.html
http://cj3b.info/Events/SEWillys2017.html
http://cj3b.info/Owners/WadeRiver.html
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binthere
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Only trouble is, I've been running it since 2009 with the same tank cap, so don't realy suspect that!!
The problem only seemed to start after I installed the rebuilt YF!!
somedays your the windsheild--somedays your the bug

Chuck - Cherryville B.C. Canada


53 3b [0IIIII0] stock except for wheel's and seats " a fistfull of dollars"
49 willys jeepster " a few dollars more"
and a few other retirement toys
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oldtime
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Lawrence is correct in that a vacumm can build up inside the tank if the cap is not venting properly.
Tank vacuum will allow the jeep to run O.K. until the tank vacumm rises above the fuel pumps output pressure.
(appox. 3-1/2 P.S.I.)

Where is the fuel filter located ? Is it possibly clogged ?
Your fuel volume seems to be sufficient but the fuel pressure could still be a problem.
The only way to test fuel pressure is with a guage.
Fuel pressure is internally regulated within the fuel pump via check valves.

Another possible concern is the float setting.
Did you set the brass float to the standard specification ?
What brand of kit did you use to rebuild the YF ?
Currently building my final F-134 powered 3B .
Rock Crawler using factory parts from the Willys Motors era (1953-1963)

http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new
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binthere
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The fuel filter is about 8 inches before the fuel filter , and is not plugged. That was one of the first things that I went for. Like I said, I don't have a pressure guage, but I might be able to borrow one from my neighbor. And finally, I was out in the shop, and did'nt have the float measurement with me, but I did measure the distance with my tape measure, and it read 3/8 of an inch. Sorry I forgot to mention that measurement before!!
I suppose that I could try and run it with a piece of sponge in the tank filler spout!!
somedays your the windsheild--somedays your the bug

Chuck - Cherryville B.C. Canada


53 3b [0IIIII0] stock except for wheel's and seats " a fistfull of dollars"
49 willys jeepster " a few dollars more"
and a few other retirement toys
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oldtime
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Reset the float to 5/16" See: http://www.film.queensu.ca/CJ3B/Photos/Tec.../YFAdjustP2.gif
Currently building my final F-134 powered 3B .
Rock Crawler using factory parts from the Willys Motors era (1953-1963)

http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new
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binthere
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thanks Oldtimie.
I'll try that tomorrow!! Boy it sure bends your mind with something like this, esspecialy when it most likely it's something realy simple!! aaaaargh!!! :( :unsure:
somedays your the windsheild--somedays your the bug

Chuck - Cherryville B.C. Canada


53 3b [0IIIII0] stock except for wheel's and seats " a fistfull of dollars"
49 willys jeepster " a few dollars more"
and a few other retirement toys
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binthere
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OK--It's the good news-bad news story today!!
Ken. I can't remember which carb kit I got, but seems to me I ordered it from Kaisers Willys early in the new year.
Today, I reset the float to 5/16 as instructed. Then, because I had drained the tank, disconnected the fuel line from the tank and fuel filter and blew it out with compressed air, reconnected line to tank, and blew air back into tank, I hooked everything back up and started the jeep! So far so good! About the third trip around the yard, It decided to quit one more time. Iwas able to start it long enough to get back in shop!
Because I ordered a new tank from Kaisers Willys (which by the way was shipped from Omnix-Ada, and fortunately for me, not like the other person, the tank fit perfectly) and picked up and installed in late March, I was most definately not expecting to have a problem with a blockage at that location!!
There is about 5 gallons of gas in the tank, so when I got it back in the shop and looked at the fuel filter and it had no gas, I had nowhere else to go but to the tank!! Instead of siphoning the gas out, I decided to remove the gas line from the bottom of the tank! Surprise surprise, no gas draining from the bottom of the tank!! I then siphoned most of the gas out and then blew into the tank. It only dripped a small amount and stopped again! Then I tried blowing air into the tank, and still cannot get a steady flow of gas. So now I will have to pull the tank and find the problem!!
I suppose that now we can call off the "big dogs" till we can get the tank to flow propperly!! :angry: :angry:
Thanks for all the help so far!!
somedays your the windsheild--somedays your the bug

Chuck - Cherryville B.C. Canada


53 3b [0IIIII0] stock except for wheel's and seats " a fistfull of dollars"
49 willys jeepster " a few dollars more"
and a few other retirement toys
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oldtime
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Well then the tank fuel pickup tube is definately the problem.
Please read: http://z4.invisionfree.com/CJ3B_Bulletin_B...?showtopic=4289
I suggest you try to force small diameter cable up through the pickup tube.
Use 1/16" or smaller diameter cable.
Currently building my final F-134 powered 3B .
Rock Crawler using factory parts from the Willys Motors era (1953-1963)

http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new
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binthere
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Well then
Ran a piece of about 3/32" cable through the pickup tube about 6 or 7 times. It probably ran into the tank 2or 3 inches. Then connected the fuel line , and put about 5 gallons of gas back in the tank. I connected a piece of hose to the gas line before the filter and into a plastic jug. Then applied some air pressure to the tank to get the gas flowing through the line. All good. When I stopped applying air to the tank, it kept on siphoning from the tank up over the front fender into the jug. Figuring everything is good, I reconnect everything and start it up. It's running sweet, so out for a test drive with the wife following in case a tow is needed. After about a ten mile run, it's back to the shop on it's own, but bucking a little if I back off the gas and then hit it again. I figure it's the point's, so I adjust them and out for another test!! About a half mile and it's sputtering real bad, so head home. Just got off the highway and it stops once more. I guesse that I'm gonna have to pull the tank for sure this time!!
Might be several days before I check back!! :( :angry:
somedays your the windsheild--somedays your the bug

Chuck - Cherryville B.C. Canada


53 3b [0IIIII0] stock except for wheel's and seats " a fistfull of dollars"
49 willys jeepster " a few dollars more"
and a few other retirement toys
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oldtime
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Be sure that the supply fitting has plugged up again before bothering to remove the tank.
Eventually you'll get it running correctly and your current effort will seem like a trivial thing.
Currently building my final F-134 powered 3B .
Rock Crawler using factory parts from the Willys Motors era (1953-1963)

http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new
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binthere
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For sure that was my plan Oldtime!! Just to make sure your always headed in the right direction!! I'm one of the first one's to make sure I'm not doing things twice because of being stupid!! :rolleyes:
somedays your the windsheild--somedays your the bug

Chuck - Cherryville B.C. Canada


53 3b [0IIIII0] stock except for wheel's and seats " a fistfull of dollars"
49 willys jeepster " a few dollars more"
and a few other retirement toys
Offline Profile Quote Post Goto Top
 
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