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Old 10-20-2012, 05:12 AM   #1
inex01
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Default Does your car stall when you come to a stop ?

After I completely rebuilt my carb the car would stall almost every time I came to a stop and I took the carb off and adjusted the float so many times I can not even remember, also changed the float valve and made sure it was not burred, also replaced the idle jet, you name it I did it including purchasing a new intake and exhaust manifold and having both freshly machined to assure a good seal and no vacuum leaks.

Well I finally found the problem "At least with my car" When I would start the car cold I turned the GAV out about a full tun + or - and then when the engine started advanced the timing and then keeping the engine a about 600 RPM would adjust the GAV for a high idle then turn in about 1/8, well that was the problem..... The GAV was in too much and when I went to stop it would not fill up the secondary well fast enough. I now have the GAV set slightly less than a 1/4 turn out from the closed position. What a difference the car NEVER STALLS and runs smooth as silk now. When on the road I do lean the engine slightly and adjust the timing and last fill up I averaged about 18 MPG so looks like I have it set up pretty well and the car performs super . I hope this may help someone.
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Old 10-20-2012, 06:21 AM   #2
BRENT in 10-uh-C
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Default Re: Does your car stall when you come to a stop ?

Good work Chuck!
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Old 10-20-2012, 08:21 AM   #3
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Default Re: Does your car stall when you come to a stop ?

Yes, very good work!

That's pretty good mileage too.

Mine used to stall at stops occasionally before replacing the intake/exhaust gaskets. Now, with new gaskets, the car never stalls, and idle is smooth. Runs like a watch now, all the time.

I hear a lot of Model A's that idle rough or "lope", but mine just purrs with no roughness or lope at all. The thing was, no vacuum leaks were detected before changing the gaskets. However, there obviously was some leak somewhere because with the new gaskets, it's like a whole new motor. VERY reliable now.
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Old 10-20-2012, 09:02 AM   #4
marc hildebrant
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Default Re: Does your car stall when you come to a stop ?

I believe that the quarter turn on the GAV is also found in the Ford Car Manual.

On cold days, I too open the GAV more than normal.....almost one turn. Then, once it is "kind of warm" I turn it back to 1/4 open, per the Ford Owners Manual (Doesn't Everyone have One ?).

Gas Mileage is 20 on trips.


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Old 10-20-2012, 05:12 PM   #5
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Default Re: Does your car stall when you come to a stop ?

No!
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Old 10-21-2012, 04:59 AM   #6
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Default Re: Does your car stall when you come to a stop ?

Quote:
Originally Posted by marc hildebrant View Post
I believe that the quarter turn on the GAV is also found in the Ford Car Manual.

On cold days, I too open the GAV more than normal.....almost one turn. Then, once it is "kind of warm" I turn it back to 1/4 open, per the Ford Owners Manual (Doesn't Everyone have One ?).

Gas Mileage is 20 on trips.


Marc
I am getting 18 MPG combined, but around town "City" about 15 MPG.I generally drive the car 150 miles a week and do track the fuel mileage every fill up, do this as it is a good gauge of the engine's health, if mileage drops there is something wrong like point gap or whatever.
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Old 10-21-2012, 10:56 AM   #7
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Default Re: Does your car stall when you come to a stop ?

Do Zeniths and Tillotsons respond differently to gav setting? I'm running a Tillotson. I set the gav once. I found where it seemed to run and idle best and have not touched it since. No, it doesn't stall at stop signs.
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Old 10-21-2012, 01:17 PM   #8
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Default Re: Does your car stall when you come to a stop ?

My car came with a Tillotson, and I changed it out for a Zenith.

The Tillotson never needed (or responded to) GAV changes. Set it and forget it. The Zenith requires occasional tweaks. I have no answer as to why. Despite having had the Tillotson rebuilt, for the the sole reason that the car is running so well, left the Zenith on.
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