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Hi All, I have several questions on a autolite 2100 carb. choke.
1. How is the choke suppose to work?
2. How is the choke adjusted?
3. What is the best way to test the operation?

When the car is cold I have to keep pumping the gas petal to keep the engine running. After warm up car runs fine. Engine is a 351C.

Thanks,
Ralph
 

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The choke, literally "chokes" the amount of air the carb gets when the motor is cold. It's supposed to have a heater hose that runs next to the choke assembly on the side of the carb. there are three screws that hold the black plastic cover still, and that is where you make your adjustment.
 

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Discussion Starter #3
There are several other adjustments. Such as the fast cold engine idle adjusting screw and the fast idle cam adjusting screw. These are some of the things that I can't figure out how to adjust. I have a manual but it is very vague. Please help!
 

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The idle speed screw is on the "drivers" side, and fast idle is "under" the passenger side. It's hard to see while on the car. Do you have a tachometer, or vacuum gauge?
 

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Hi All, I have several questions on a autolite 2100 carb. choke.
1. How is the choke suppose to work?
2. How is the choke adjusted?
3. What is the best way to test the operation?

When the car is cold I have to keep pumping the gas petal to keep the engine running. After warm up car runs fine. Engine is a 351C.

Thanks,
Ralph
I have a 68 with Autolite 2100 and auto trans 302" engine
I set the fast idle at 1400 rpm--1 lean on choke--1/8"-9/64 choke plate opening cold
slow idle in park 650-700 in drive 550 rpm I used the inner pump level hole and
#2 overtravel lever hole
Fast idle you turn the choke cc say 90 degrees rich (temporarily)
place fast idle screw on index of fast idle cam
turn screw to adjust
measure distance between choke valve and air horn wall (set mine at 1/8 drill bit)
then set choke to 1-lean & tighten the 3 screws
Hope this helps
351 is #3 hole 2-rich for AT fast idle 1600 rpm
1-rich for ST fast idle 1300 rpm

In other words on the pass side behind the choke there is a set screw
you open the throttle ½ way and using a 1/8" drill bit adjust until you
have that opening with the choke turned 90 degrees rich(temporarily) then I believe on a 351
you turn the choke 2-rich for AT and 1-rich for ST
this may depend on where you live
Engine has to be cold
 
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