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10-27-2012, 10:23 PM | #1 |
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zenith carb baffles to prevent stalls during braking
So I've rebuilt the carb to the best of my abilities... a Zenith II.
I still ever so often get a stall when I come to a stop. Has anyone come up with a baffle for their carb bowl to prevent this from happening?
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10-27-2012, 10:38 PM | #2 |
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Re: zenith carb baffles to prevent stalls during braking
I've thought about a baffle, but never pursued it. Bill W.
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10-27-2012, 10:43 PM | #3 |
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Re: zenith carb baffles to prevent stalls during braking
My carb does the same thing if I brake fairly hard (which is normal braking for many modern driver's). Just pull the throttle lever down a notch or two while braking.
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10-27-2012, 10:49 PM | #4 |
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Re: zenith carb baffles to prevent stalls during braking
This web site has excellent troubleshooting for carburetor rebuild and troubleshooting.
http://www.modela.org/ |
10-27-2012, 10:54 PM | #5 | |
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Re: zenith carb baffles to prevent stalls during braking
Quote:
I hear from many veteran A drivers that this is a very common issue, all of whom all say to pull down the throttle a few notches to prevent it when needed. I've got to bet theres someone out there who has hands off trick to prevent the carb from stalling out as well.
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10-28-2012, 03:16 AM | #6 |
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Re: zenith carb baffles to prevent stalls during braking
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10-28-2012, 03:18 AM | #7 |
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Re: zenith carb baffles to prevent stalls during braking
Try increasing the float level when you apply brakes you are pushing gas forward in the bowl I raised my level and stop this
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10-28-2012, 08:50 AM | #8 |
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Re: zenith carb baffles to prevent stalls during braking
Lowering the float a small amount will usually solve the problem. Lowering the float reduces the amount of gas in the bowl that sloshes first foward and then back when the car comes to a stop and floods the engine. I keep an assortment of gaskets that fit under the float valve assy. adding a thin gasket as a shim lowers the float valve and changes the float level.
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10-28-2012, 10:51 AM | #9 |
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Re: zenith carb baffles to prevent stalls during braking
After the last carb rebuild, where the proper size jets were installed, the car doesn't stall on hard stops, or ANY stops anymore. It's just super smooth and reliable now.
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10-28-2012, 05:47 PM | #10 |
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Re: zenith carb baffles to prevent stalls during braking
#7 says increase flat level, #9 says lower the float level................
Which is it?? Paul in CT |
10-28-2012, 06:45 PM | #11 |
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Re: zenith carb baffles to prevent stalls during braking
Thanks Vince ! ! !
Paul in CT |
10-28-2012, 07:01 PM | #12 | |
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Re: zenith carb baffles to prevent stalls during braking
Quote:
1) sight tube gauge from snyders 2) fully rebuilt carb using adams instructions, used aerosol carb cleaner and a paperclip for all "secret passageways"... they were free at least free and flowing then (measurable?) 3) good idea, but that did cross my mind and I added extra shrink tubing to possible wear points when i first noticed that potential back to 1, if i set mine at 5/8" below gasket surface... would you recommend i bump up or down the float setting?
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10-28-2012, 08:12 PM | #13 |
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Re: zenith carb baffles to prevent stalls during braking
The Dog just called me to the pendulum clock and barked, barked, barked,----- Oh! I see, just firmly affix a lead pendulum weight to the carb lever and when stoppin' HARD it would advance the throttle! Amazing Dog! Send treats in c/o BUSTER T. Brown Bill W.
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10-29-2012, 06:57 AM | #14 |
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Re: zenith carb baffles to prevent stalls during braking
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10-29-2012, 09:24 AM | #15 | |
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Re: zenith carb baffles to prevent stalls during braking
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Twice I've encountered the issue with stalling when coming to a stop and in both cases it was solved by readjusting the idle mixture. I don't recall which direction for sure but I suspect I opened it up to lean it slightly. I can say however that I adjusted it until the idle speed started to slow and then increased the speed slightly with the lever stop screw, still maintaining a nice slow idle. I wrote a similar description to the same question here sometime back but the person asking the question never reported back.
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10-29-2012, 10:52 AM | #16 | |
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Re: zenith carb baffles to prevent stalls during braking
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10-29-2012, 10:56 AM | #17 |
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Re: zenith carb baffles to prevent stalls during braking
have you tried a different carb? or two?
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10-29-2012, 12:12 PM | #18 | |
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Re: zenith carb baffles to prevent stalls during braking
Quote:
In my experience when I cannot get a change in the performance with the air idle adjustment I have found that the passage in the air idle circuit has a partial blockage. Thus resulting in no change from adjusting the air idle screw as the passage block is controlling the volume of air, not the air idle screw. |
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10-29-2012, 12:33 PM | #19 | |
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Re: zenith carb baffles to prevent stalls during braking
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10-29-2012, 01:33 PM | #20 |
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Re: zenith carb baffles to prevent stalls during braking
Had that same problem (no difference with idle adjustment) on a ebay bought "professinally rebuilt" Zenith carb. This is a guy that sells a bundle of carbs he rebuilds on ebay, and is supposed to be one of the "experts". The jets were wrong, and the car did stall at stops. After having the "new" carb rebuilt by someone who actually knows what the Zenith is supposed to look like, the car runs like a swiss watch. Never stalls, no matter how quick the braking or jerking around. It's just a rock-solid running car now, feels like a whole new motor.
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