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Unread 01-13-2008, 07:04 PM   #1
wh74415
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1979 CJ7 
 
Join Date: Mar 2007
Location: boone
Posts: 167
rough idle then dies

so, when i start my jeep up and start to drive, it starts to idle really rough when its cold. like to the point where it cuts off. it only does this when its cold or its raining. i live near the coast but i recently moved to the Appalachian mountains. does my jeep have a altitude problem or do carburetors just not like cold wet conditions. i have use seafoam cuz i thought that the jets might be clogged but like i said before, once the engine gets warm it run fine. any tips on stuff i should do, other than let it run for 10 min. before i drive(i cant afford to waste gas)?

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Unread 01-13-2008, 07:48 PM   #2
crusty75
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1975 CJ5 
 
Join Date: Oct 2004
Posts: 424
Check and adjust your automatic choke.
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Unread 01-14-2008, 08:48 AM   #3
Totallymetal
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2007 JK Wrangler 
 
Join Date: Jun 2007
Location: Colorado
Posts: 458
Bought my Jeep from a gal that moved to the Denver area from Iowa, that had serious problems with it running correctly. Timing and air/fuel mixture was off. I corrected it and have had no problems since.
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Unread 01-14-2008, 10:01 AM   #4
Mike Romain
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1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 11,870
Quote:
Originally Posted by wh74415
so, when i start my jeep up and start to drive, it starts to idle really rough when its cold. like to the point where it cuts off. it only does this when its cold or its raining. i live near the coast but i recently moved to the Appalachian mountains. does my jeep have a altitude problem or do carburetors just not like cold wet conditions. i have use seafoam cuz i thought that the jets might be clogged but like i said before, once the engine gets warm it run fine. any tips on stuff i should do, other than let it run for 10 min. before i drive(i cant afford to waste gas)?
Mine acts like that in the damp and cold when my distributor cap and rotor are old and grumpy in the weather. Maybe time for a new set?

Our car was just doing this and I had a look and had sparks flying out of three wire boots on the coil packs. It is worth a check, I test for leaky wires by spray misting them with water in the dark while it's running. I didn't even need the dark or mist on the car, they were big sparks.
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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 01-14-2008, 06:20 PM   #5
HighCountry
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1986 CJ7 
 
Join Date: Aug 2001
Location: North East Texas, Texas
Posts: 998
Mine was doing the exact same thing, maybe not quiet so rough but I am a perfectionist. I replaced my 6 year old Plug Wires and it actually smoothed it right out...

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