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post #1 of 5 Old 09-09-2012, 06:47 PM Thread Starter
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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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post #2 of 5 Old 09-10-2012, 12:21 PM
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Google the color of the smoke. that sometimes will tell you what issues you have...
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post #3 of 5 Old 09-10-2012, 11:31 PM
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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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post #4 of 5 Old 09-11-2012, 02:03 AM
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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.

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1981 CJ7 258ci - Bagusjeep
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post #5 of 5 Old 09-11-2012, 03:03 AM
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has it been setting?
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