set motorcraft idle
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New User
Joined: Apr 2009
Posts: 9
Likes: 0
From: tennessee
set motorcraft idle
i need to know how to set or adjust a motorcraft carburetor. i have a 390 with 2bbl motorcraft carb that wont idle and id like a little bit of help please and thanks!!
Senior User
Joined: Jan 2009
Posts: 134
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From: Nor Cal
If I may take the liberty...try this link, it was a tremendous help for me.
https://www.ford-trucks.com/forums/76...ml#post6422219
https://www.ford-trucks.com/forums/76...ml#post6422219
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
If I may take the liberty...try this link, it was a tremendous help for me.
The page cannot be found
The page cannot be found
Senior User
Joined: Jan 2009
Posts: 134
Likes: 1
From: Nor Cal
That's strange...try this:
https://www.ford-trucks.com/forums/7...ml#post6422219
He can also search "will not idle"
https://www.ford-trucks.com/forums/7...ml#post6422219
He can also search "will not idle"
Postmaster
Joined: Jul 2003
Posts: 3,934
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From: iowa
First of all timing has its role in your idle. The idle mixture screws should work at 1.5-2 turns out. Then adjust the idle screw to your liking.
If that doesn't work check floats, and rest of carb out. And check for base gaskets leaks and or intake gaskets leaks.
Use a vac gauge!
If that doesn't work check floats, and rest of carb out. And check for base gaskets leaks and or intake gaskets leaks.
Use a vac gauge!
Thread Starter
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New User
Joined: Apr 2009
Posts: 9
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From: tennessee
it will stay running aslong as i keep pumping the pedal or push it but when i let off of it it will idle for a second but then it cuts off. i jus put this carb on it and a ford man told me that it just needs to be adjusted(idle and mixture screw) but i found the screws and im fixing to try to set it then i will get back at you'll and update you on the progress thanks!!
Logistics Pro
Joined: Oct 2005
Posts: 3,785
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From: Mddl A MexCans
(1) Engine off take the mixture screws in to just lightly seating and back out 1.75 turns CAUTION: "do not screw them al the way in to tight" (2) Bring it up to temp. (3) Check/set timing. (4) If automatic, set the park brake and chock the wheels. (5) Restart it and put in D have someone help to keep the idle up if need be until you can manually do it at the carb bring it to 600rpm (it should idle good enough to run on it's own by this point) if not... plan on some investigation with a vac gauge and other tools. How to Use and Interpret a Vacuum Gauge
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New User
Joined: Apr 2009
Posts: 9
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From: tennessee
Thanks for all the help!!! The trucks running great. My problem was i had to adjust a screw that moved a rod which regulates the fuel. It idles fine and fires up on first turn! Once again I[B]REALLY[B] appreciate all the help. I will deffinately comeback for help on any problems in the future!!
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