It would be unburnt fuel
Exhaust of an engine is a gas.
It could be timing is off. Need more info. Is it Fuel injected or Carburated? Exhaust smoke? Is it black? Black indicates alot of carbon built up. May mean the fuel is burning way to rich.
Could be EGR Valve.
An exhaust valve(s) staying open upon compression.
Exhaust leaks close to the engine.
No, an exhaust leak would have nothing to do with your engine timing.
No, not related.
For steam to come out the exhaust you probably have a bad head gasket or a cracked head. If the turbo had an oil seal fail it would cause blue smoke to come out the exhaust.
An exhaust restiction, like a clogged catalytic convertor
There are several reasons that can cause smoke two, out of the exhaust on your 1993 Chevrolet suburban. The most common reason is a dirty fuel injector.
A broken piston ring is the most common cause of water in the exhaust manifold. A bad valve in the cylinder head can also cause the problem.
Leaking valve cover gaskets would leak onto the exhaust pipes under the hood of the car.
You have a problem with your carburator. Have it looked at
no but it may cause it to stall if exhaust is blocked
incorrect engine timing so that it misfires
The burning smell from the exhaust pipe may be caused from oil or transmission fluid leaking into the exhaust pipe. For example, if your turbo is failing on the car, then that can cause leakage from the manifold into the exhaust pipe. There may be other reasons, too, which other people will be better articulating.
potato with in whistle in it, jammed into the exhaust pipe?
i think it is cause of smoking if someone smokes then he/she coughs black that would be cause of smoking
A hole in the muffler would cause a knocking sound in your muffler. A loose exhaust pipe can also cause a knocking noise.
Excessive heat, but what would cause that I don't know.
Head gasket or cracked head. Mo
a dining sound could be lose nuts on the exhaust