2004 Ford F250 "put black smoke" Questions

I have a 1991 F250, it puts out really black smoke when first started. Smoothes out after it warms up. What could be causing this? sticky piston rings or worn valve seals

...black smoke,hacks and coughs till back to idle then idles fine ,not drivable till idles for half an hour,will not go on high idle Ford 2004 6.0, Driving down road seams like when it starts warming up ...

put a full tank in and added additive to it to see if that helped clean the injectors but same thing and now its blowing a little black smoke. low fuel psi, posible fuel pump, think it needs about 110

...Put a long screwdriver directly on the injector while the car is running. Hold the handle up to your ear. You should be able to hear a rhythmic clicking sound. If you do, your injector is good. ...

black smoke coming from tailpipe had the ford dealship replace all 8 injectors egr value and clean out blower and 3500 $ later still have problem truck used to have chip in it but was taken out before

...put some epoxy to temporarily stop the leaks around the valve. I did check the compression, it's really good on all cylinders, about 150 psi. I have to mention that there is also a little miss ...

...put the main bearing and stil smoked white smoke is water lite blue or black smoke is oil. Replacing the main bearing would not cause it to smoke, Could be eather a bad plug not getting fire or oil ...

...put a map sensor on it already what else could it be? since you've replaced the map sensor I'll assume you're dealing with black smoke. a bad coolant and/or intake air temperature sensor could create ...

...burn the fuel that is delivered. Oil smoke is white/blueish, black smoke is unburnt fuel. Running too rich check for dirty air filter or pvc valve, if good put a scanner on and check for trouble ...

...black smoke when put foot down fills road Black smoke is a sign of engine overload, a restricted air supply, or a malfunctioning injector. For some reason, excess unburned fuel is being blown out of ...