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Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > burning oil and running rich

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Unread 06-10-2010, 07:56 AM   #1
ton12loc
Registered User
1992 YJ Wrangler 
 
Join Date: Jan 2008
Location: Baltimore, MD
Posts: 49
burning oil and running rich

I have a 92 4.0L and sometimes while driving and when I shift gears I can see some blue smoke from the exhaust. the jeep does burn some oil also, plus it smells like it is running rich and the smells gets bad enough to give a headache but I'm used to it, wife hates it lol I know I pretty much need to do a rebuild on engine but is there a quick fix or cover up for the blue smoke but more so for the smell..that is somewhat annoying...thanks

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Unread 06-10-2010, 08:51 AM   #2
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,608
If your running rich then you have either a bad temp sensor, O2 sensor, or the manifold is missing bolts/lose, or crack which is common especially near the rear by the firewall.
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Unread 06-10-2010, 08:58 AM   #3
88blkyj
Registered User
1988 YJ Wrangler 
 
Join Date: Feb 2010
Location: Florida
Posts: 583
get a compresssion test and see what cylinder is bad. also do a wet and dry to test to determine why your burning oil
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Unread 06-10-2010, 12:19 PM   #4
pasinbuy
Registered User
1994 YJ Wrangler 
 
Join Date: Feb 2007
Location: florida
Posts: 3,843
I am surprised that your plugs are not fouling out. You should check them to see which cylinder if not all, is bad. You might want to start checking on a rebuilt motor.

How many miles on it? How bad does the oil look?
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