Carb Help Quick
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Junior User
Joined: Oct 2008
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Carb Help Quick
Took the carb off to rebuild it. On the pass side of the carb there is a small canister type thing with with the word "Lean" on it and arrows pointing in a clockwise direction. There is a metal tube leading from the canister to the manifold. What is that for? Because it broke off at the manifold. Please help! Thanks
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Junior User
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There is little hash marks and a black plastic cover that you can turn 2 or 3 marks in either direction. What happens if it's not connected? Basically I'm asking if it will A) catch fire or B) run.
Postmaster
Joined: Aug 2000
Posts: 3,312
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From: Eldorado Ca. USA
its the choke heat tube. If you broke it, dont worry. Just plug the vacuum port on the carb so you dont create a vacuum leak. You can convert it to an electric choke, or just turn that black cover to lean so the choke does not stay on forever. Yes it will run, no it wont catch fire.
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Junior User
Joined: Oct 2008
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its the choke heat tube. If you broke it, dont worry. Just plug the vacuum port on the carb so you dont create a vacuum leak. You can convert it to an electric choke, or just turn that black cover to lean so the choke does not stay on forever. Yes it will run, no it wont catch fire.
Thread Starter
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Junior User
Joined: Oct 2008
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its the choke heat tube. If you broke it, dont worry. Just plug the vacuum port on the carb so you dont create a vacuum leak. You can convert it to an electric choke, or just turn that black cover to lean so the choke does not stay on forever. Yes it will run, no it wont catch fire.
Also, which screws do I adjust for the idle? Cold and warm? Where are they? I have a Haynes manual but it doesn't show a picture.
Postmaster
Joined: Aug 2000
Posts: 3,312
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From: Eldorado Ca. USA
they are on the front of the carb, right below the float bowl. Start off at 1 1/2 turns. Hook up a vacuum gauge, aim for the highest vacuum readings. Quickly whiff the exhaust, tune till it dont stink rich. Be careful, you can die from carbon monoxide poisoning. There are other (proper) ways to adjust a carb, but this way works easy enough for me, and gets it close enough. Also, adjust your timing, and adjust the idle to keep it where it otta be.
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Junior User
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they are on the front of the carb, right below the float bowl. Start off at 1 1/2 turns. Hook up a vacuum gauge, aim for the highest vacuum readings. Quickly whiff the exhaust, tune till it dont stink rich. Be careful, you can die from carbon monoxide poisoning. There are other (proper) ways to adjust a carb, but this way works easy enough for me, and gets it close enough. Also, adjust your timing, and adjust the idle to keep it where it otta be.
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MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
The tube running to the choke is the hot-air stove. Without it, your choke cannot open. You need this hooked up for the stock choke to function correctly. Or, you need to close it up and install an all-electric choke like masterbeavis suggested.
masterbeavis's procedure for setting idle mixture is good; I use a vacuum gauge myself. Curb idle is on the driver side of the carburetor. Fast idle is a separate mechanism and is on the passenger side. Here is my writeup on setting fast idle, it will tell you everything you need to know. Ignore the first couple paragraphs about the float.
https://www.ford-trucks.com/forums/7...ml#post6422219
By the way masterbeavis, long time no see!
masterbeavis's procedure for setting idle mixture is good; I use a vacuum gauge myself. Curb idle is on the driver side of the carburetor. Fast idle is a separate mechanism and is on the passenger side. Here is my writeup on setting fast idle, it will tell you everything you need to know. Ignore the first couple paragraphs about the float.
https://www.ford-trucks.com/forums/7...ml#post6422219
By the way masterbeavis, long time no see!
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
That would be the throttle return spring. It's responsible for bringing the throttle back to closed after you pull back on it. I looked through some photos of an engine pull I did and found one that might help some more. Here it is:
As you can see, the throttle return spring connects between a bracket mounted to the throttle body, and the throttle linkage itself. I can't say I've ever seen an additional spring used here. There may be a second spring mounted to the transmission kickdown linkage, but I don't recall seeing one before.
As you can see, the throttle return spring connects between a bracket mounted to the throttle body, and the throttle linkage itself. I can't say I've ever seen an additional spring used here. There may be a second spring mounted to the transmission kickdown linkage, but I don't recall seeing one before.