why is smoke coming out my muffler?
Friday, September 23rd, 2011 by Admin
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mike asked:
I have a 94 suburban and when ever I start it or take off after a complete stop smoke comes out the muffler. It does’nt really come out while im driving but like i said every time i take off it will throw smoke. I really cant tell what color the smoke is but i know its not black. If anyone has any opinions i would be more than happy to heir them……thanks
I have a 94 suburban and when ever I start it or take off after a complete stop smoke comes out the muffler. It does’nt really come out while im driving but like i said every time i take off it will throw smoke. I really cant tell what color the smoke is but i know its not black. If anyone has any opinions i would be more than happy to heir them……thanks
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Smoke comes out because you are burning fuel…………….
Sounds like you’re burning oil.
Yeah, something’s burning. Usually means you’re overdue for an oil change.
Not enough oxygen to burn the provided ‘fuel’ can make the cloud.
Too much gasoline or some oil in the combustion chamber will do it.
Blue or bluish-white smelly smoke means you are burning OIL, probably from worn rings or valve seals allowing oil to get into the cylinder. Also, if you stick our finger into the tailpipe and wipe it around, you’ll get black, oily deposits.
White smoke (like a fogger) means you are sucking transmission fluid (probably through a faulty transmission (vacuum) modulator valve).
Also, white vaporous smoke could mean that you have a blown head gasket and are sucking engine coolant into one or more cylinders. When you are under load it’s more noticeable.
Several tests are in order:
A compression test for each cylinder. Do each cylinder and see if you have one or more that have low compression. Low compression indicates leakage past the rings or past the head gasket (between cylinder head and block).
Now if you find low compression on say, cylinder 4 and 6, and you conduct a coolant pressure test and notice that the cooling system will not hold pressure, suspect a blown head gasket. If the cooling holds pressure OK, then you have worn rings on the pistons.
If you have a fuel injected engine, you may have coolant leaking into the throttle body (as engine coolant is ususally circulated thru the throttle body for cooling and heating) via a bad gasket or crack.
If the compression is good, suspect worn valve guides or valve stem seals (if the smoke is blue).
A bad tranny modulator valve would be evident if you do a vacuum test and notice low vacuum on the intake side.
All in all, it can be diagnosed pretty easily but the cost of fixing will not be (a faulty modulator valve is simple, though).
if it is not blake it hast to be water go to the tel pipe and see if it is missing ithink you have a crack head