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440-6 idle adjustment #291701
04/18/09 09:44 AM 04/18/09 09:44 AM

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I am advised to try leaning out my idle a little to rid the backfire on deacceleration. Do I turn the adjustment screws in or out to lean it out? Also what is a standard for the outboards? Holley tech thought maybe 1/8 turn out but was not sure.
Re: 440-6 idle adjustment #291702
04/18/09 10:12 AM 04/18/09 10:12 AM
Joined: May 2008
Posts: 46
Colorado
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hemiluver Offline
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Joined: May 2008
Posts: 46
Colorado
I think on those carbs its out to lean because your adding air not fuel
Re: 440-6 idle adjustment [Re: hemiluver] #291703
04/18/09 10:22 AM 04/18/09 10:22 AM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
are yuo sure you don't have a tiny exhaust leak somewhere? Especially if it's only out one side.
Re: 440-6 idle adjustment #291704
04/18/09 12:45 PM 04/18/09 12:45 PM
Joined: Nov 2005
Posts: 836
lancaster, new york
macmic87 Offline
super stock
macmic87  Offline
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Posts: 836
lancaster, new york
all 3 carbs are clockwise to lean, counter clockwise to make richer.
Re: 440-6 idle adjustment #291705
04/19/09 03:44 PM 04/19/09 03:44 PM
Joined: Nov 2005
Posts: 836
lancaster, new york
macmic87 Offline
super stock
macmic87  Offline
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Joined: Nov 2005
Posts: 836
lancaster, new york
any luck?
Re: 440-6 idle adjustment [Re: hemiluver] #291706
04/19/09 08:26 PM 04/19/09 08:26 PM
Joined: Feb 2003
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Pangaea
B5 Bee Offline
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Posts: 8,020
Pangaea
Quote:

I think on those carbs its out to lean because your adding air not fuel



Idle screws add a mixture of air and fuel.


A lean idle should not cause a backfire. Look elsewhere for your problem. Check the normal causes first before blamming the carbs. An exhaust leak or fouled spark plug are the most common causes.

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