idle adjust?
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Joined: Dec 2004
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idle adjust?
79 f-150 97,000 miles v6 300ci.
I just put new carb on, and I am blown away by how good it runs now, but I cant figure out how to get it to idle down. If I let off the gas at 30mph, it stays there. Im not sure on carb numbers, but it is same as original, it has two idle ajustment screws, and 1 air fuel screw. If I turn air fuel in the idle goes down a little, but I dont think that is what I should do. any ideas?
I just put new carb on, and I am blown away by how good it runs now, but I cant figure out how to get it to idle down. If I let off the gas at 30mph, it stays there. Im not sure on carb numbers, but it is same as original, it has two idle ajustment screws, and 1 air fuel screw. If I turn air fuel in the idle goes down a little, but I dont think that is what I should do. any ideas?
Laughing Gas
Joined: Jul 1999
Posts: 1,048
Likes: 22
From: Lacey, WA
Hi,
First off do you mean you have an L6 300 not a V6 300?
Next I think you should have 2 idle mixtures screws and one idle speed screw.
It sounds more like you have a throttle sticking problem. Check your linkage from the gas pedal all of the way to the carb. Also disconnect the linkage and return spring from the carb and work the carb linkage by hand. See if it binds up, it should move freely.
You can adjust the idle speed with the single idle speed screw located on the drivers side of the carb.
Hope this helps,
Lee
First off do you mean you have an L6 300 not a V6 300?
Next I think you should have 2 idle mixtures screws and one idle speed screw.
It sounds more like you have a throttle sticking problem. Check your linkage from the gas pedal all of the way to the carb. Also disconnect the linkage and return spring from the carb and work the carb linkage by hand. See if it binds up, it should move freely.
You can adjust the idle speed with the single idle speed screw located on the drivers side of the carb.
Hope this helps,
Lee
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Joined: Dec 2001
Posts: 22,436
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From: Louisville,Ky.
A 1 bbl carb will have 1 idle mixture screw, a curb idle screw and a fast idle screw for when the choke is on. As Lee mentioned, will it idle down with the throttle cable unhooked? If not, and the two screws on the linkage don't help, you could try loosening the two mounting screws and move the carb around a little, it could be barely hitting the intake or the carb gasket.
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I dont know, it is inline 6. I finally figured out how to turn the dashpot back on mine, which the model that I have was not shown in any books I looked at. Turned it back to Idle it down, but the idle stays the same now, at least I cant tell if their is any change, due to the choke kicking in. I havent taken the time to see what is happening because it seems to be running soooo gooooood. If you have any ideas, they are most welcome. meanwhile, I keep reading. by the way ,carter 1 bbl
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