It is completely normal for a diesel to smoke black. But, if it just now started to smoke black and everything on the truck is stock, go get it checked out by a mechanic. You could have bad fuel injectors or a dirty air filter. Start with the simple stuff first. And, I'd say from it being a 2004 Powerstroke 6.0L, that your injectors are probably bad.
There are lots of places where someone can buy an injector for a Ford Powerstroke diesel truck. Some of these places are: Black Cloud Diesel and eBay.
Unburnt fuel in exhaust.
Already been done. Diesel Particulate Filters and Diesel Exhaust Fluid.
Could be a diesel? If not then replace your oxygen sensor on your exhaust. A bad oxygen sensor causes the exhaust smoke to be dark in color.
oil fill on a 7.3 diesel is on the passenger side of engine about 1/3 of engine length back from the front of engine this filler has a black screw on cap with a picture of an oil can
6.4L Powerstroke Dual Turbo Diesel V8 - - - 12mpg city / 17mpg highway COMBINED - - - 14.5mpg (Fuel effeciency can be improved by a DPF delete kit. This will make your truck blow black smoke but it's completely normal for a diesel. Deleting the DPF will void your 6.4L Powerstroke Turbo Diesel V8's 5 year/100,000 mile warranty.
If it's a Powerstroke diesel, you get a tuner or programmer and straight pipe the exhaust. My son has a 2007 Ford F-250 with the 6.0L Powerstroke, and he SCT Tuned his truck and used the 4-inch Hushpower exhaust system and his truck is great at ROLLIN' COAL!!! His truck produces 445 horsepower and 818 pound feet of torque and gets 20 miles per gallon. All at the touch of a button. SCT Tuners are great and awesome for the price. :D Visit SCT's website and Hushpower/Flowmaster's website at www.hushpower.com or www.flowmastermufflers.com. Hope I helped. :D
Their injection pump is set too rich, and lets more diesel into the engine than the engine can burn. The partially/badly burned diesel is what comes out as black smoke.
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
My understanding of exhaust smoke is that Blue is oil, Black is unburnt fuel, White is unburnt diesel on cold start. The main question would be, how much smoke and when does it do it?
IDI diesel fuel filters are (looking from the front of the vehicle) on the right side of the engine. Looks like an oil filter hanging upside down. On powerstroke diesels, they are on the top of the engine, mid-way back. They have a black, "screw-on" cap about 4" in diameter. Recommend using a WIX filter... STAY AWAY FROM THE FRAM FILTER!!!
i put a chip in mine and it black smokes