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Old 06-02-2021, 03:47 PM   #1
rfitzpatrick
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Default Red-Lite Misery

After I've done a nice run outside of town, I'm getting hesitation/stalling while waiting for lite-change, they're getting longer now. Would the Model B Zenith be worth it? This is my second Model A Zenith now, and was wondering if I should consider.
Thanks
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Old 06-02-2021, 04:34 PM   #2
Patrick L.
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Default Re: Red-Lite Misery

Fix what you have. If it is the carburetor, it should be an easy fix. Its a simple carburetor. Clean it, a tag wire thru the passages followed with a can of Deep Creep spray and some air should work. Set the float level. Adjust the idle mixture and speed, set the GAV at 1/4-3/4 turn out and it should be good to go.

First make sure there is not an air leak and the ignition system is good.
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Old 06-02-2021, 05:22 PM   #3
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Default Re: Red-Lite Misery

See http://model-a.org/default.html
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Old 06-02-2021, 06:44 PM   #4
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Default Re: Red-Lite Misery

I had that problem. Sediment in the float bowl was causing it.
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Old 06-02-2021, 10:13 PM   #5
Chuck Sea/Tac
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Default Re: Red-Lite Misery

What’s the ambient temperature? It sounds the the beginnings of vapor lock. Try insulating the gas line and adding some marvel mystery oil to the gas. I ended up with an isolation spacer between the carb and manifold. I also built an aluminum deflector that not only shields the carb from the engine, but directs air from the fan. My car doesn’t “hesitate” after a run at the traffic lite anymore. If you shoot your carb in different places with a temp gun, you’ll be surprised how hot the carb gets.
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Old 06-03-2021, 04:12 AM   #6
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Default Re: Red-Lite Misery

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Quote:
Originally Posted by Chuck Sea/Tac View Post
I ended up with an isolation spacer between the carb and manifold. I also built an aluminum deflector that not only shields the carb from the engine, but directs air from the fan.
Can you post a picture?


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Old 06-03-2021, 01:11 PM   #7
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Default Re: Red-Lite Misery

Also, check for a short in the stoplight switch
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Old 06-04-2021, 07:42 AM   #8
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Default Re: Red-Lite Misery

Gas cap vent? Chap
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Old 06-04-2021, 08:07 AM   #9
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Default Re: Red-Lite Misery

I had that problem. Sediment in the float bowl was causing it.

why I put a magnet in all of my float bowls.
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Old 06-05-2021, 12:18 PM   #10
Chuck Sea/Tac
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Quote:
Originally Posted by shew01 View Post
Can you post a picture?


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I’m not sure the pic is going to come thru
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Old 06-05-2021, 05:37 PM   #11
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Default Re: Red-Lite Misery

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Last edited by redmodelt; 06-06-2021 at 08:38 AM.
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Old 06-05-2021, 07:30 PM   #12
Chuck Sea/Tac
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Default Re: Red-Lite Misery

Quote:
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That is not a Model A Zenith, it is 32-24 B style carb.
What does that have to do with fuel vaporizing from heat.?
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Old 06-06-2021, 08:44 AM   #13
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I’m not sure the pic is going to come thru

Thanks. What did you make your spacer out of?


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Old 06-06-2021, 10:21 AM   #14
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Default Re: Red-Lite Misery

So after a nice long drive everything is warmed up and adjusted for cruising. I would try opening the GAV and maybe retarding the timing a little. Can you get it to die parked in your driveway? after its warmed up? I would adjust your carburetor idle speed and idle air
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Old 06-06-2021, 07:05 PM   #15
Chuck Sea/Tac
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Quote:
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Thanks. What did you make your spacer out of?


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Tacoma bob made it for me out of a phenolic plastic of some sort.
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Old 06-06-2021, 07:22 PM   #16
Gene F
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Default Re: Red-Lite Misery

That shield looks interesting. Do what ya gotta do to keep driving is what I always say. So, good for you!
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