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Unread 11-11-2012, 06:17 PM   #16
86cj74.2L
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Quote:
Originally Posted by awesomejack
Yeah, but if it was the choke plate causing this, then he would be running rich, but the spark plugs say its lean...
The choke not working will cause the high idle. No matter what.... it needs to be fixed.

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Unread 11-12-2012, 01:32 PM   #17
concretenomad
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You guys are right about the choke. It's not opening the plate all the way for some reason. If there's an air leak inside the carb (I can hear it only when the air cleaner is off and it gets quieter when I put my hand over the top) So if there's an air leak in there, would that cause my choke to stay closed just a bit? I think the choke is working the way it should. When I open it all the way (by hand) the whistling starts... when the choke is closed just a bit (where it likes to rest) it doesn't whistle but idles high. I sprayed the outside of the carb and it didn't idle higher... so I don't know where it's pulling air from. does this make sense to anyone? I guess the question now is; Is the whistling causing the choke to stay shut just a bit, or is it a separate issue with the choke just not opening all the way (is that possible?)
Also do you know if the electric choke can be replaced with manual? would that be a bad idea for any reason?
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Unread 11-12-2012, 05:36 PM   #18
86cj74.2L
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With engine cold your electric choke should be completely closed.

Anything else your choke is not operating properly.
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Unread 11-12-2012, 05:41 PM   #19
concretenomad
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I'm not having trouble with the choke operating with the engine cold. It starts right up all the time. The trouble is with it operating with the engine at running temp, and the whistle inside the carb.
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Unread 11-12-2012, 06:34 PM   #20
86cj74.2L
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Just because it starts right up doesn't mean your choke is working properly.

You choke should be shut cold. And all the way open warm. No slop or play that would allow it to close some. That closeing of the choke plate is increasing your idle
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Unread 11-12-2012, 06:44 PM   #21
scottg73
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Yeah, just being closed when its cold doesn't mean its working. It also has to open. The spring in the choke cap could be bad or just maybe the cap is twisted a little too much and so the spring isn't pushing the choke open all the way.

.
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Unread 11-12-2012, 07:01 PM   #22
ceej7
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wire choke plate wide open when engine is at full operating temp. drive a couple of miles and see if this helps. if it does, and i think it will, the choke needs adjusted, and or plugged in. if no power to choke, check the fuse in the fuse box on the back up light circuit, as the choke is powered off of this circuit. when engine is fully warmed up choke plate should be wide open if working. engine must be running in order to have power to choke wire as it is wired through the oil pressure switch. if oil pressure present,switch will close allowing 12 volt to choke. i would start with this, then let us know and we can walk through some other possible cause/ effect/solutions
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Unread 11-12-2012, 07:14 PM   #23
concretenomad
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Debating on replacing heat coil or just putting a manual choke on it.... But what about that whistling? Shouldn't that be a concern also? Thanks for all your help everyone!! I know I bumble around a bit... I'm just getting to know this vehicle. I'm surprised that there's so much more "stuff" on it than my '72 cj5 had.... which I also bumbled on
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Unread 11-12-2012, 07:26 PM   #24
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Quote:
Originally Posted by concretenomad
Debating on replacing heat coil or just putting a manual choke on it.... But what about that whistling? Shouldn't that be a concern also? Thanks for all your help everyone!! I know I bumble around a bit... I'm just getting to know this vehicle. I'm surprised that there's so much more "stuff" on it than my '72 cj5 had.... which I also bumbled on
The whistling is a produce of high manifold vacuum and the throttle plate being almost shut. It makes the noise from the small air gap.
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Unread 11-12-2012, 08:03 PM   #25
concretenomad
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The whistling happens with the choke wide open... not closed. It stops when the choke settles at a little shut with the high idle. I know its hard to picture whats going on without looking at it and going by what I'm saying.
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Unread 11-12-2012, 09:40 PM   #26
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Quote:
Originally Posted by concretenomad
The whistling happens with the choke wide open... not closed. It stops when the choke settles at a little shut with the high idle. I know its hard to picture whats going on without looking at it and going by what I'm saying.
The whistle goes away because the throttle plates open more when the choke plate closes a little and bumps up the idle rpm.
image-2622396836.jpg  
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Unread 11-13-2012, 09:22 AM   #27
concretenomad
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OK So, plan of action is I'm going to look for a manual choke cable today, put it in, and forget about the whistle. Thanks to everyone for your help!!!
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Unread 11-13-2012, 01:47 PM   #28
concretenomad
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Put a manual choke on today. Success!!! purrs like a kitten. Thanks everyone for your help!!!!
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