No. This means that the manifold has an exhaust leak.
engine tune just a major service then maybe a new exhaust system
In some cases blocked catalic converter
If you have an issue with furnace exhaust in your home and soot is exhaust. Please stop wasting your time here. That is dangerous. Call somebody! Nobody here can tell you what it is with out looking at it.
That is called condensation. When you start the engine the exhaust system/pipes are cold. When the heat from the engine exhaust passes through the exhaust it makes it sweat. That is normal.
Exhaust soot is Carbon based molecules that have not reacted to completion in the combustion chamber.We input Hydrocarbon, Air, and Exhaust gas (EGR), and hope that we burn all the hydrocarbon into carbon dioxide and water. If there is not enough oxygen in the combustionchamber for the amount of fuel (through over allowance of EGR or otherwise) then we get soot paticles forming.
either its running to lean or you have a bad exhaust valuve
burning oil
Are you sure it is not mold? That could be a health risk. If you heating with an oil fired furnace it might be cracked and allowing exhaust in your home. You might need to have this checked out proffessionally since the by product of this exhaust is carbon monoxide.
It usually means too much fuel or not enough spark.
burning to "rich", too much fuel. This is a result of an incorrect air/fuel mix. check fuel pressure regulator, Oxygen sensor (s), and maybe PCM.
A running Diesel engine releases soot in its exhaust. Another word for soot is particulate pollution - as soot consists of small particles.