Question about 2002 Jeep Liberty
light blue smoke would suggest a small amount of oil being burnt in the cylinder. could be a valve stem seal, or a faulty oil control ring on a piston.
grey/ black smoke would suggest excess fuel, usually due to a clogged air filter.
white smoke would suggest water being burnt in the cylinder from a blown heat gasket. this would usually smell slightly sweet and sugary from the antifreeze/summer coolant in the water.
any smoke from the tailpipe should be checked as the emissions could be out of limits as well.
check the spark plugs one at a time.
blackened dry plugs would suggest excess fuel.
black and oily plugs would suggest oil in that piston.
it should give you an idea of where to start looking for the fault.
Posted on Apr 06, 2011
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Posted on Jan 02, 2017
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