Runs fine when it reaches operating temp, but right up until then it coughs and sputters, belching black smoke if you give it too much fuel. Takes 2 miles to reach 40 mph.2004 6.0 liter F350, I cleaned the EGR valve and put dilectric silicone on all the computer connections. No difference.

The 5.4 is a Ford engine. Need to have a smart scanner connected to the OBDII to facilitate this analysis. The trick is to compare the two banks and see if the problem is common or only related to Bank 1. If it is common check for vacuum leaks. Fuel pressure and MAP. If not check fuel injectors spark coil O-2 sensor before catalytic converter. The comparison between banks help a lot.. I use a Bosch 1200 that allows me to graph two parameters and it has helped during warm-up to track fuel trim between Bank1 and Bank2.

Hope this helps?

What color is the smoke?
Black means running rich.
Gray or white is coolant
Blue is oil.
This shounds to me like a fuel system issue. Injectors might be bad

Wrong fuel octane water in fuel...

What color smoke ? Blue = oil burning , black = too much fuel (rich) white = coolant - blown head gasket ,cracked head or block . White also could be caused fuel running through the engine , no combustion !
What Your Exhaust Smoke Is Trying To Tell You

Stuck Open Fuel Injector how to fix

low fuel psi, posible fuel pump, think it needs about 110 psi to run

White smoke is usually from water and water will make the car splutter. Did you get water in your tank at some time. If you have water in your fuel, you will have to drain the tank and refill with good fuel. The engine will run fine once it is hot but if a lot of water goes into a hot cylinder it can cause a lot of damage.

You have fuel in you cylinder.....Check your carburetor. It might need adjustments. Also, check for faulty fuel pump, injector, engine electronic. Also, check your fluids...all of them.

Hunnybunny

It's a Dodge, what more do you want?

Sounds like an oxygen sensor problem. O2 sensors have to be warmed up to around 900 degrees to properly operate, so until they're up to temperature, the ECU ignores them and fuels the engine on preprogrammed fueling maps stored in the ECU. Once they're up to operating temperature, they provide feedback to the computer for properly fueling the engine. Blowing black smoke indicates a rich condition (excessive fuel), which usually is the result when and oxygen sensor is defective. The computer realizes the O2 sensor isn't working right and goes to a rich-fueling map for the engine. Rich running is not damaging, other than it can foul spark plugs and (if untreated for a long enough period) could clog the catalytic converter. This is better than a lean condition (too little fuel) which superheats the cylinders and causes them to detonate, which can fatally damage the engine. I would change out the primary oxygen sensors and see if your problems go away. You may need to get new spark plugs as well, especially if this has been going on for awhile - they may be carbon-covered and not firing efficiently.

check your tail pipe for a "clog" engine not breathing correctly.