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High idle when I stop

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Old 06-02-2008, 06:13 PM
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Default High idle when I stop

I have a 1976 FXE, when I drive it after it's warm the idle is high when I come to a stop then it drops down to normal. I have pulled the carb and checked the O-rings, all looks good. Tried spraying starter fluid on it to see if idle picks up but it doesn't, so intake leak is out. I just bought 2 new springs for the advance and I hope this takes care of it. Anyone have any other sugestions?
 
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Old 06-02-2008, 09:18 PM
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Default RE: High idle when I stop

ORIGINAL: MUSHHEAD

I have a 1976 FXE, when I drive it after it's warm the idle is high when I come to a stop then it drops down to normal. I have pulled the carb and checked the O-rings, all looks good. Tried spraying starter fluid on it to see if idle picks up but it doesn't, so intake leak is out. I just bought 2 new springs for the advance and I hope this takes care of it. Anyone have any other sugestions?
If the timing doesn't fix the high idle check the throttle shaft for wear in the carb body.....this will give you an intake leak too. I have to say 95% of the time a haigh idle or idle speed taking it's good old time coming down is usually and intake leak. When you said you checked the '0' rings did you replace them when it went back together?
 
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Old 06-02-2008, 11:22 PM
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Default RE: High idle when I stop

when my old shovlehead did that, I just richened up the idle mixture a tad bit
 
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Old 06-03-2008, 06:53 AM
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Default RE: High idle when I stop

The carb is 2 years old, S&S super "E", linkage should be good, O-rings were not replaced because they were also in good shape. I didn't have time last night to change the springs but when I do I will repost.
 
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Old 06-03-2008, 07:10 AM
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Default RE: High idle when I stop

ORIGINAL: MUSHHEAD

The carb is 2 years old, S&S super "E", linkage should be good, O-rings were not replaced because they were also in good shape. I didn't have time last night to change the springs but when I do I will repost.
Once an'0' ring has lost it's seal it needs to be replaced..... in my opinion using the same '0' ring is asking for trouble. BTW, the S&S carbs are notorious for leaking at the throttle shaft.
 
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Old 06-03-2008, 08:24 AM
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Default RE: High idle when I stop

If it is a intake leak, throtle leak, or bad o-ring wouldn't the idle stay high? The idle drops after a few seconds after I stop.
 
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Old 06-03-2008, 08:54 AM
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Default RE: High idle when I stop

Not necessarily....the bigger the leak the longer it will idle up.
 
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Old 06-13-2008, 06:24 PM
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Default RE: High idle when I stop

Sorry it's been so long to get back on here but I did manage to fix my problem. I can't say for sure what did it but I changed both the timing advance springs and all 4 of the O-rings on the intake and carb. plate and now it runs better than it ever did. Thanks Doc for all you help.[/align]
 
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Old 06-13-2008, 06:26 PM
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Default RE: High idle when I stop

Well that's good news....and your more than welcome.
 
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