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Lot of exhaust

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Lot of exhaust
C

cworm

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Oh, in need of help. I have a 84 CJ7 6 cyclindar and have just corrected my vaccum leak. However, I have a lot of exhaust coming out of my tailpipe. It is blowing constantly and I can't tell if the smoke is black or white. Not sure but it seems like I am wasting gas quickly. Does it has something to do with the carb? What can I do so i can drive without my top?
 
Did it smoke before you fixed your vaccum leak?
 
Yes, I also had a leak in the muffler that I replaced. So, now it seems that all the smoke is now coming out of the tail pipe.
 
Has it set for a long time?
is it using oil?
have you done a compression test?
 
Yes, it sat for 6 months while I was deployed. Then when I shipped it from Hawaii to Florida. Not sure if it is using oil. I have an oil leak from somewhere (think it is from the cover). No, haven't done a compression test.
 
Did it smoke before you deloyed?
Does it smoke worse at startup?
Ya valve covers (if thats the cover you mean) on AMC 258 i6 / 4.2l leak by design.
 
Yes, it smoked before deployment but not as bad. The same on startup. Do you know how to fix the valve cover leak?
 
cworm said:
Yes, it smoked before deployment but not as bad. The same on startup. Do you know how to fix the valve cover leak?
Click to expand...

Well as for the valve cover, check all the bolts that secure it and if they need a little tightening then good...otherwise you may need to pull it off and replace the gasket.
The smoking exhaust, a compression check is a good place to start. If it smoked mainly when started then cleared up conventional wisdom would say possibly bad valve guide seals although not a sure thing. If it smokes all the time and burns oil then I would tend to think piston rings and the compression test would somewhat validate that. When you check the compression if you have a low # on a cylinder try a squirt or two of oil into the cylinder and recheck, if no change and still low the maybe a bad valve but concidering smoke is your prob and not poor performance that is a little unlikely.
 
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