it can be unburned fuel damaged turbo charger etc. light amount of smoke can be normal large amounts = problem.
If it is turbo diesel, then the turbo is blowen
carbon result of incomplete combustion.
The black smoke is caused by too much diesel fuel being supplied to the engine when you first open the throttle. Quite often this happens when the fuel injectors are worn and /or the turbo is not coming up to speed quick enough.
At the front of the injector body,with a black twin lead coming out of the top. The solenoid is approx 25mm around and is screwed in.
they have elected a pope? in cold weather it is normal to see white smoke coming out of your tailpipe. the one you have to worry about is the black or the blue smoke
running too rich check the air filter could also be defective injectors
this will happen on all diesel engines (if its going to make reasonable power) its basically soot/carbon from the exhaust and unburnt diesel. on some high power turbo diesel cars there is proper plumes of black smoke. you only need be worried if there is blue smoke while on boost as this means the turbo is shot. but black = good
Black smoke can be caused when there is an improper air to fuel ratio . This can be anything from a plugged air cleaner,injector,turbo....
Black smoke indicates excessive fuel possibly the engine is flooding this would also explain the gurgling.
blown turbo - worn turbo bearing causing oil to suck through and into exhaust manifold - results in no power and neat oil burning in the exhaust - major black smoke
neat time you fill your car with fuel make sure you buy some injector cleaners this will help the problem.
07 dodge ram 2500 cummins turbo diesel