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Old Jan 11, 2016 | 10:00 AM
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Quick Idle Question
I have 86 Auto f150 with a hei type distibutor and pre-emision 1bll carb. Were should my fast idle be set, and curb idle be set, i have my choke tube coming in today and wanted to get this all tuned in
 
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Old Jan 11, 2016 | 11:29 AM
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Are you meaning RPMs?
Curb idle is generally around 700 and fast idle is 1700.
 
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Old Jan 11, 2016 | 11:45 AM
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Originally Posted by AbandonedBronco
Are you meaning RPMs?
Curb idle is generally around 700 and fast idle is 1700.

so 700 is setting curb idle with the auto transmission in gear correct?
 
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Old Jan 11, 2016 | 11:51 AM
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I'll have to let someone else answer that, I've never had an auto so haven't done it.
 
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Old Jan 11, 2016 | 02:17 PM
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My 1986 manual transmission 4.9L idles @ ~650-700 RPMs. I would think the auto transmission equipped truck engine will need to be a little higher. Is there a factory emissions sticker on the radiator support? That usually supplies that information.
 
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Old Jan 11, 2016 | 05:40 PM
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No mine was computer controlled so it has none
 
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Old Jan 11, 2016 | 06:17 PM
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Set it where it works for you and drive happy...
 
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Old Jan 12, 2016 | 09:46 AM
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Originally Posted by 1986F150six
My 1986 manual transmission 4.9L idles @ ~650-700 RPMs. I would think the auto transmission equipped truck engine will need to be a little higher. Is there a factory emissions sticker on the radiator support? That usually supplies that information.
I just looked on the radiator support of my 1986 F150 with 4.9L engine, which was originally computer controlled [now Duraspark] and the original factory sticker indicates: 500-600 RPMs in drive for an automatic. It also specifies 1500-1600 RPMs for fast idle.
 
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Old Jan 12, 2016 | 11:20 AM
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Nice distributor... Why not upgrade carb and intake?

Let the upgrade bug take you away and empty your wallet!
 
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Old Jan 13, 2016 | 11:33 PM
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Originally Posted by 1986F150six
I just looked on the radiator support of my 1986 F150 with 4.9L engine, which was originally computer controlled [now Duraspark] and the original factory sticker indicates: 500-600 RPMs in drive for an automatic. It also specifies 1500-1600 RPMs for fast idle.
Awsome thanks
 
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Old Jan 13, 2016 | 11:35 PM
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Originally Posted by ZarK-eh
Nice distributor... Why not upgrade carb and intake?

Let the upgrade bug take you away and empty your wallet!
in time this is the first step but its also my daily, gotta save up some more for the big power
 
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