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Unread 02-22-2014, 01:34 AM   #1
cwig12
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1983 CJ7 
 
Join Date: Jun 2013
Location: Chesterfield, Missouri
Posts: 209
As the title states, when I turn on my Air Conditioning the rpms drop by about 300 or so. I have a 3 speed fan in it and in the summer it sometimes kills my Jeep when idling at a stop. Is this normal for it to drop rpms so much? I wouldn't think it would be. I didn't put the AC in so I'm not sure how it's setup. Any simple fix to this?

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Unread 02-22-2014, 01:58 AM   #2
John Strenk
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1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 12,658
It's normal for it to do that but you should have a solvac or something that should kick the RPM back up.

Lots of time when people pull off polution stuff, this feature gets yanked or made inoperative. It wouldn't be that hard to rig one up if you an find the parts.

Biggest thing would be this part on the BBD carb.


IF you are running a Weber or MC2100 then you will have to rig up something else.
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Unread 02-22-2014, 11:33 AM   #3
cwig12
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1983 CJ7 
 
Join Date: Jun 2013
Location: Chesterfield, Missouri
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Looks like I need to find one, the PO replaced the stepper motor carb with a rebuilt non stepper. (Carter BBD) Things are missing on it, one being the solvac. I guess he also tried bypassing some things which has given me a lot to clean up lately. Time to search ebay or something. Thanks John
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Unread 02-22-2014, 03:40 PM   #4
Mike Romain
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1986 CJ7 
 
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Location: Off the Grid in Chester Grant, Nova Scotia, Canada
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If the stepper is gone, then the computer is likely gone too. Some folks just put the sol-vac back on it and use an electric switch to turn it on when needing a faster idle. This gets around the lack of computer control. It fire up either by vacuum or 12V.

Hmm thinking about it a standard 'Bosch' type relay with a trigger signal from the AC power line would do it automatically.
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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Unread 02-22-2014, 05:22 PM   #5
cwig12
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1983 CJ7 
 
Join Date: Jun 2013
Location: Chesterfield, Missouri
Posts: 209
Yeh, I'll have to check to see if I can find the computer. When it warms up I'm going to rip out the old wiring harness and put the new one in. Might just mess with it then. I'll probably end up rebuilding the carb at that time as well. The rebuild sticker on it is from about 12-13 years ago. Hopefully I can fix some of the major kinks that have been in the system. Slowly but surely I've been taking care of them. This is my DD so I'm getting it to where I don't have to worry and can rely on it to work. Thanks for the info and suggestions.
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