because its old and you should get rid of it
Is the check engine light on? May be the O2 sensor or any number of things causing it to run rich.
Blowing black smoke is indicative of an oil leak in the engine.
Black smoke is a symptom of an overly rich fuel/air mixture.
loss of power after,or with black smoke , indicates the turbo has quit.
its a diesel, you will see black smoke alot.
You can stop your 7.3L from blowing black smoke by verifying that it is burning fuel cleanly and make sure the fuel mix is not too rich. You can also verify that it is not burning any oil.
why do u want it to stop blowing smoke man! blowing smoke is awsome and manly, and show power! be proud that your blowing smoke!
Black smoke indicates a rich fuel mixture (over fueling). This can be caused by many different problems.
Have your injectors checked or changed, burnng to much fuel
Assuming this is a gasoline engine, it is running rich from excess gasoline.
check your vacuum hoses, check your fuel pressure regulator as well.
Air filter dirty or bad injector
your car leaked oil into the combustion chamber. blue smoke= burnt oil, the loss of power is from inproper combustion