Coughs and dies at stop

[jerrytocci]

Engine runs good at a steady speed but wants to cut out at a stop or deceleration . I need to keep the pedal active to avoid this

[J Franklin]

The float could need to be raised or lowered as gas sloshes at stops. This is most likely your trouble.

[jg61hawk]

Do what you want but Jim Bullock can rebuild your carb and you won't have problems...

https://www.fordbarn.com/forum/showthread.php?t=293126

Click the the center link below it takes you right to his site and his e-mail!

[email protected]

https://jmacarbs.com/

903 748 8299

My A has never run so good since I got the carb back this past winter....can't be happier and more secure in driving.

[Mulletwagon]

Had the same problem which turned out to be the idle adjustment. Unlike modern carbs, the idle mixture needle contols air and not fuel. Turning the needle in actually richens the mixture. My problem went away after a proper idle adjustment with a slightly rich idle mixture.

[Ed in Maine]

Jerry, see my post on 2-17-21, 12:15 PM on this very subject. Ed

[Jacksonlll]

Sponsored Links (Register now to hide all advertisements)

Air leak into your intake. Two places, manifold to engine and carb flange to manifold.

[Y-Blockhead]

Originally Posted by Mulletwagon

Had the same problem which turned out to be the idle adjustment. Unlike modern carbs, the idle mixture needle contols air and not fuel. Turning the needle in actually richens the mixture. My problem went away after a proper idle adjustment with a slightly rich idle mixture.

For those of us with a Marvel Schebler Carburetor the idle mixture screw does control the gas, Not air. Like modern carbs.

Just thought I would throw that out there.

[aermotor]

I agree with Jackson111. I had the same problem. Spray carb. cleaner around the manifold to block and carb. to manifold gasket. If engine speeds up that's the problem.

John

[Anteek29]

Originally Posted by Jacksonlll

Air leak into your intake. Two places, manifold to engine and carb flange to manifold.

Wonder why this happens while stopping and not while at rest? Yes, unless the carb/intake/block interfaces are really loose...

[Ernie Vitucci]

Good Morning...I often use my hand throttle when coming up to a stop light, particularly if it is a fast stop. I just pull in down a click or two and the engine continues to run. Then I put it back up to the top again...Ernie in Arizona

[Anteek29]

Originally Posted by Ernie Vitucci

Good Morning...I often use my hand throttle when coming up to a stop light, particularly if it is a fast stop. I just pull in down a click or two and the engine continues to run. Then I put it back up to the top again...Ernie in Arizona

You should not have to do that with a properly set up carb. Although, the early Zeniths seem to be somewhat more problematic.

[Jacksonlll]

The fuel moves forward in the bowl resulting in a slightly lower level of fuel in the jets during the decel, and a little air leak is too much air for the small amount of idle fuel.
Just my opinion.

[jerrytocci]

Thanks to all....I found a hairline crack on exhaust manifold and gasket was bad .

[Anteek29]

Jerry...Thanks for your finding/closure!