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Idles but dies with throttle
Topic Started: Sep 23 2012, 03:10 PM (725 Views)
Austinfaucheux
Member
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I have a 1960 3b that idles fine but is dying once i start to give it decent gas. Has a hard time restarting again. Next day it will start fine and idle again but dies again with throttle. Any help with places to start looking would be appreciated.
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oldtime
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Carter YF 938 ?
I suggest you remove the air horn assembly (top of carburetor) and take a look inside the fuel well.
See dirt particles in the bottom of the fuel well ?
Measure the exact depth of fuel in the well and report your findings.

As always thanks for posting on the B.B.!
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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Austinfaucheux
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Yes sir Carter YF 938. Looked inside and saw a little bit of dirt particles. Didn't really see a measurable amount of fuel though. Recently put a new fuel filter on. I'm a bit green with the mechanics of it all, but I'm learning. Thanks for any help!
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oldtime
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Quote:
 
Didn't really see a measurable amount of fuel though.

That's certainly a problem.
Apparently sufficient gasoline is not being pumped into the fuel well.

Probable causes:
No fuel in tank
Plugged fuel tank outlet
Plugged fuel tubes
Non functional fuel pump
Plugged fuel filter
Non functional carburetor fuel inlet valve


I suggest that you remove the fuel output line from the fuel pump and temporarily run a hose into a can.
Remove spark plugs and crank the engine. The can should soon fill up with gasoline.
If not the pump is not operating or the tank pickup is likely restricted.
Tell us what you observe....

http://z4.invisionfree.com/CJ3B_Bulletin_B...?showtopic=4289
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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jyotin
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The symptoms you describe could be fuel starvation, BUT they could also describe too much fuel, or flooding.

When the engine cuts off and won't restart, lift the hood immediately and look for any fuel dripping from the side of the carburetor. If it is dripping it'll be obvious.

If it is dripping or you see fuel outside of the carb it is flooding.

Even if it isn't dripping, it could still be flooding internally. The best way to check that is after the engine quits running and won't restart, take the air horn off the carb, disengage the choke, and wait somewheres between 15 minutes and a half hour and try again. If it starts then, I'd suspect flooding.

Those YF's can flood badly externally, or internally, or both -- they can also flood some days and not others.

If you do have a flooding problem, a carburetor rebuild with the CORRECT internal parts is in order...

good luck

j
It's just my luck that something good is going to happen to me today.
54 - 3B - down on the farm
67 - cj6 - former state of Alabama vehicle
?? - cj5 T98a - made from spare parts - Ford tractor blue
?? - cj5 T98a - made from spare parts - Jeep green
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oldtime
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The YF absolutely can not be flooded if there is minimal or no fuel in the fuel well.
A flooding condition can only occur if and when the fuel inlet valve components are not functioning correctly.
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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Austinfaucheux
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Checked the fuel tank and it was very nasty inside. I replaced it with a new one, checked all the fuel lines, replaced the fuel filter and seems to run fine now. At least it's not cutting out, yet. Haven't really ran it too hard. I will keep my fingers crossed and updated. Thanks for the help!
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