304 indling high?? electric choke. please help - JeepForum.com

 
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post #1 of 4 Old 04-19-2013, 03:30 PM Thread Starter
78304
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1978 CJ7 
 
Join Date: Feb 2013
Location: Dubuque
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304 indling high?? electric choke. please help

I have a 78 CJ with a 304. Jeep has an electric choke installed by the previous owner. When i got it it would idle really high after a cold start but eventually i could give it a little rev and it would go back down to normal idle. i recently had a painless harness installed and now it idiles high no matter how warm it gets?? The guy that installed the harness had question reguarding the choke. So i wondering if somethings wired wrong and the choke is constantly feeding fuel? or do i have other issues? Thank you guys in advance. Thought i was looking at a weekend of muddy fun but this high idles annoying and makes its hard to drive!!

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post #2 of 4 Old 04-19-2013, 04:01 PM
jeepdaddy2000
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1971 CJ5 
 
Join Date: Jan 2002
Location: Eagle Point
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There should be a wire going to the choke housing. You need to see if there is juice going to it with the ignition in the on position.
The choke is also adjustable, both for high idle and dropoff time. Once you get the power situation fixed, let us know and we can walk you through the adjustment steps.
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post #3 of 4 Old 04-19-2013, 05:43 PM Thread Starter
78304
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1978 CJ7 
 
Join Date: Feb 2013
Location: Dubuque
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Thank you for the help! I know there's power threw the ignition switch. I will look into the settings and get back. Thanks again
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post #4 of 4 Old 04-19-2013, 07:00 PM
rah2eq
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1978 CJ5 
 
Join Date: Nov 2011
Location: Richmond
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Your electric choke isn't original I don't think, but anyway, there are a couple of things that could be causing your issue. The original carburetor on my 78 has a fast idle cam right underneath the choke that holds the throttle slightly open as your Jeep heats up. The choke applies pressure to this in order to take it off when it gets warm, so this could be your issue. If I were you, I would check this linkage when your Jeep is warm and make sure that it isn't still engaged.
Also, a vacuum leak will cause your engine to have a high idle, so make sure that you didn't accidentally bump any hoses off or anything with the installation of the harness.
As a side note, I vaguely remember when I rebuilt my carb (MC 2100) that the choke housing was under vacuum. It could be that your electric choke isn't sealed perfectly against the carburetor and you have your vacuum leak there.
Good luck.

1978 CJ5 - 304 V8 - Twin Sticked and sitting on 35's
2010 JK- Rock Krawler 2.5" on 35" KM2's
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