Cold engine runs ruff untill choke opens -
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Unread 01-21-2010, 02:17 PM   #1
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1990 YJ Wrangler 
Join Date: Jan 2010
Location: Sonora
Posts: 54
Cold engine runs ruff untill choke opens

When the engine(4.2L) with stock carb is cold and the choke sets to the closed position the engine runs very rough and almost dies if driven before it warms up enough to open the choke. This seems just the opposite of what it should be doing. I'm thinking of a new carb but this just doesn't sound like that's the problem. Any ideas?

Last edited by Lgleason; 01-21-2010 at 03:40 PM..
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Unread 01-21-2010, 03:46 PM   #2
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1984 CJ7 
Join Date: Apr 2008
Location: Maricopa, Arizona
Posts: 116
This was happening to me recently, I found that my choke was closing too much and not letting in enough air. So I backed it off a little more and now is all good.

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