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Unread 09-09-2012, 06:47 PM   #1
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Join Date: Apr 2011
Location: Hoover, Alabama
Posts: 27

I have a 86 258 4.2l. I have nuttered it. I have set lean mix. I have set timing 8 BTC. Starts right up. at idle no smoke. reved it smokes like a teepee. did not start until today when I reset timing and adjusted carb. I am fixing to pull pcv valve and see if it smokes the same out of the valve cover. I read a previous thread where it was noted that carb being out of adjustment might make it smoke. I pulled spark plug and no oil or grease on plug. any suggestions would be much appreciated.

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Unread 09-10-2012, 12:21 PM   #2
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1979 CJ7 
Join Date: Dec 2009
Location: aiken SC
Posts: 206
Google the color of the smoke. that sometimes will tell you what issues you have...
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Unread 09-10-2012, 11:31 PM   #3
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1986 CJ7 
Join Date: Dec 2007
Location: Denver Colorado
Posts: 1,877
If it is coming out of the tailpipe when you get on it and is somewhat of a blue color, you most likely have bad rings. Bad valve or guides it would smoke at idle also. Do a simple compression test. Easy to do and will tell you what is going on if it smokes like a teepee.
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Unread 09-11-2012, 02:03 AM   #4
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1981 CJ7 
Join Date: Jul 2009
Location: Bali, Indonesia
Posts: 5,068
Did it smoke previously?

If light blue smoke that hangs about it is oil, if white and disappears can be water or fuel.

Oil will come past valve guide seals or rings. Water through head gasket or crack. Fuel is a carb adjustment issue.

It may smoke when cold but not when hot.
BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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Unread 09-11-2012, 03:03 AM   #5
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1981 CJ5 
Join Date: Mar 2012
Location: Oakhurst, Oklahoma
Posts: 578
has it been setting?
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