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Anonymous
Guest
I just rebuilt my Holley 1940 and the the boal is dry after only maybe an hour or so and I dont see any leaks externally! Please help.
Bryce
Bryce
Not familiar with that carb, so someone else can answer better than me. The usual questions... is the heat percolating the gas out (check by looking in the carb after you shut it off, if you see any gas dribbling down the throat), your float could be too high doing the same and causing a siphoning effect, are all your gaskets tight, nuts and screws tight??
goinbroke2
Well-known member
The fuel is going into the engine. The most common cause is a plugged air bleed which allows the fuel to siphon out the booster. (when air stops going by the booster fast enough to suck the fuel up the emulsion tube and down the booster leg into the airstream, it's supposed to drain back into the bowl)
hmm, how to make it clearer.....picture a siphon hose in a gas tank with a pinhole at the highest point. If you suck hard enough you'll get gas, but as soon as you stock sucking or creating enough flow, the air coming in the pinhole allows the gas to run back into the tank. Now if the factory "pinhole" is plugged then the gas keeps pouring out until the tank (or bowl) is dry.
You just rebuilt it so it should be clean....notice I said "should" and not "is"?
Take the airfilter off and run the engine. When you shut it off, look down the carb throat, you will see gas dripping out of the booster.
Unless....something is warped and is an actual physical defect. I tried to rebuild a 4300 autolight one time that the body warped extremely bad because someone used a nut and wrench instead of a wing nut and finger when installing the breather. Having Popeye turn the little screws on the carb can cause warpage too.
hmm, how to make it clearer.....picture a siphon hose in a gas tank with a pinhole at the highest point. If you suck hard enough you'll get gas, but as soon as you stock sucking or creating enough flow, the air coming in the pinhole allows the gas to run back into the tank. Now if the factory "pinhole" is plugged then the gas keeps pouring out until the tank (or bowl) is dry.
You just rebuilt it so it should be clean....notice I said "should" and not "is"?
Take the airfilter off and run the engine. When you shut it off, look down the carb throat, you will see gas dripping out of the booster.Unless....something is warped and is an actual physical defect. I tried to rebuild a 4300 autolight one time that the body warped extremely bad because someone used a nut and wrench instead of a wing nut and finger when installing the breather. Having Popeye turn the little screws on the carb can cause warpage too.
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Anonymous
Guest
OK
To answere the first reply, all of the screws and bolts are tight, and I did set the float as per the instructions and everything there seems fine,
And for the second it is dark and only about 17 degres here and I have a Chevy in the garage (yes another project underway!) LOL But i will take a look at what you asked me to tommarow first thing! First I will have to give it a little gas through the throat first to get it started :roll: But then I will check it!
If that is the case, what is the resolution to the matter?
Thanks in advance
Bryce
Twisted_6977
To answere the first reply, all of the screws and bolts are tight, and I did set the float as per the instructions and everything there seems fine,
And for the second it is dark and only about 17 degres here and I have a Chevy in the garage (yes another project underway!) LOL But i will take a look at what you asked me to tommarow first thing! First I will have to give it a little gas through the throat first to get it started :roll: But then I will check it!
If that is the case, what is the resolution to the matter?Thanks in advance
Bryce
Twisted_6977
pedal2themetal45
Famous Member
Power valve leaking, after you start it ... and shut it off pull the air cleaner and look down the carb and see it ther is a cloud of gass or can you see gass drippng down the ventura's..
tim
tim
goinbroke2
Well-known member
Pedal to the metal, yeah I forgot to mention that too!
Replace bad or leaking powervalve or clean air bleeds.
Replace bad or leaking powervalve or clean air bleeds.
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Anonymous
Guest
Thanks for all the help guy! I really didnt get around to doing anything with the little Bronc today, I had the little man with me all day! Man I love those time just me and the boy, he is almost 10 months! Anyway now I have to replace the heater core! LOL begining to be a never ending story of repair
Bryce
Bryce
