Setting the choke

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Oct 21, 2002 | 12:41 PM

bluemustang

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Joined: May 2001

Posts: 178

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From: Columbia, TN

Setting the choke

I need a little help setting the choke on my carb. Know that it's getting cold outside when I first start my truck has alot of blue smoke comes out the back and it runs rought for awhile. It does fine when it's warm out side. It's a 75 F100 with a 390. It has an electric choke.

Can anyone help?

Oct 21, 2002 | 04:41 PM

dfisher1

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Joined: Jul 2001

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From: Gainesville, FL

Setting the choke

Blue,
Is your choke hooked up? Mechanically/electrically.
If so, there are three screws that hold the black round canister to the side of the carb. Look closely and you'll see that the round thing is mark richer/leaner with some arrows. Loosen the screws and turn the round thing in the direction you need. You need richer. Tighten the screws when your done.
Good Luck,
KingFisher

Oct 21, 2002 | 11:45 PM

429fordf250

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Joined: Oct 2002

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From: mesa us of a

Setting the choke

you wll also need to check and see that the choke pulloff is working. this when the truck is running supplies vac. and slightly pulls the choke open so it is not shut then the truck is warming up.

Oct 22, 2002 | 09:27 AM

brents

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Joined: Apr 2001

Posts: 321

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Setting the choke

Hi,

Does your truck have the warm air stove connected to the air cleaner intake? It is there to pre-heat the air going into the carb.

I found my truck runs really bad without it.

-Brents

Oct 22, 2002 | 03:44 PM

bluemustang

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Joined: May 2001

Posts: 178

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From: Columbia, TN

Setting the choke

dfisher1' I do have the choke hooked up, I will set it richer and see what it does.

429fordf250= not for sure what the choke pulloff is.

brents= It's all connected, but not for sure if it's working. I took the tube off and stuck my finger in there it it was not open.

Oct 22, 2002 | 04:00 PM

teschwab

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Joined: May 2002

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From: nc

Setting the choke

bluestang, when you stuck your finger into the snorkle the flap should be closed when cold. closed meaning its blocking fresh air from entering the air breather. once the engine is warm you should notice that the flap is open allowing fresh air to enter the air breather. you should be able to check this without sticking your finger into the snorkle.

Oct 22, 2002 | 09:05 PM

429fordf250

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Joined: Oct 2002

Posts: 13

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From: mesa us of a

Setting the choke

what motor and carb 2bbl ford holley 4bbl? on some carbs the pull of is a vac pod that is screwed to the carb some have a vac line going to it. there is a arm that pulls back when running and this pulls open the choke so not to block to much air.