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K-Jet rough/lumpy idle, looking for troubleshooting tips 200 1980

posted by  Rhys on  Thu Apr 19 00:15 CST 2012
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last visit: Tue Nov 20 10:22 CST 2012
[RELATED]

I keep thinking that the high idle has something to do with it. And that air continues to cause a lean condition - perhaps explaining why the idle mixture adjustment has little effect.
Good to hear the injectors are working properly - that eliminates them as a cause too.
The other thing that can cause a rough idle ( but not the fast idle ) is valve clearances that are too tight. Anything less than .012 will make the idle lumpy, but affect nothing else.





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