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Rough Idle

   
Old Aug 25, 2018 | 03:13 PM
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Default Rough Idle
'09 Dyna bounces vertically a lot at idle. Motor mounts are new. Replaced all sensors, but not the IAC. Cleaned the IAC, but no appreciable effect. Injectors are new. Replace the IAC?
 
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Old Aug 25, 2018 | 03:36 PM
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If you mean there's visible engine vibration and movement at idle but it smoothes right out with a little bit of throttle, that's the normal behavior of rubber-mounted Twin Cams... Is it fine once you're riding?
 
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Old Aug 25, 2018 | 04:08 PM
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All stock?

Condition and quality of tune (including idle speed!) as well as any aftermarket mods (including pipes!) can greatly affect idle quality.
 
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Old Aug 25, 2018 | 04:44 PM
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Stock. Idles like a ditch pump. Didn't used to.
 
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Old Aug 25, 2018 | 06:19 PM
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Originally Posted by Huggerbugger
Motor mounts are new. Replaced all sensors, but not the IAC. Cleaned the IAC, but no appreciable effect. Injectors are new.
Honestly? All that doesn't mean crap if you got stuck with cheap/bad gas. (too much ethanol?)
 
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