Black smoke diesel6.5 turbo

if diesel and turbo , check turbo operation of for holes in the intercooler
if turbo or naturally aspirated check/ replace injector tips as black smoke indicators squirting and not atomizing
if petrol check for excessive fuel pressure, faulty injectors , leaking injector seal
regardless of petrol or diesel --black smoke indicates incorrect air / fuel ratio ( too much fuel) so injectors, intercooler, bad turbo or blocked air cleaner are all candidates for the fault

Best I can tell this is a diesel truck? I know diesel, but
depending on age could be injectors, possibly Diesel injection pump hopefully not. The fuel is black? Someone is putting old engine lubricating oil in the fuel tank. It will increase the problem of black smoke. It may also have a bad smell because of the engine oil. If the turbo is not spinning properly (high pitched whine) the bearings may be bad and it's not getting enough air into the engine. This would also explain the smoke problem. Take it to a Diesel specialist!

Is it a TDI? if so you may have fuel issues or possibly a turbo issue check and make sure all your hose connections from your turbo to the air to air cooler and air cooler to engine are hooked up also make sure there are no holes or cracks in your air to air cooler. check your air filter. Black smoke indicates you ar buring fuel too much fuel not enouph air in the combustion chamber.

this case , you have to check turbo charger , when high RPM white smoke means lubricate oil goes to engine so give white smoke . on low rpm trubo close coming black smoke means no enough air gose to engine so this need to replace turbo . some type of turbo can be clean the wase gate ( which open with diafam beside turbo) make sure it's moving when accilerate. check vacum is ok . then clean wase gate > only some type have wings inside )if no replace turbo

Your turbo has provisions for oil to cool bearings and the seals have blown out, although from my experience the result is white smoke if it is pumped into the hot exhaust. The reason it goes is usually a combination of things-high boost at cold temperatures, thicker oil under start up conditions or running oil that is a higher viscosity than recommended. Your crankcase pressures, the condition of the PCV and subsequent systems also contribute to this problem

The return path from the turbo is sometimes the issue and has to be clear, and I think the turbo seals could be bad, but black smoke is usually associated with excessive fuel.. You will also get alot of smoke when the oil return is slow to return the oil to the sump and it backs up into the turbo. It forces it's way out of the seals making it smoke.

Black smoke indicates you are running rich. You may have to address the fuel injectors to make sure one is not stuck open. After replacing the MAF censor this would be my next step. Also your turbo seal might be leaking causing your truck to run rich throwing off the o2 censor. Also you can get black smoke from turbo blowby. Not burning oil but actual oil passing the rear turbine seal and getting into the exhaust. This should give you a few good places to check out. Good luck to you.

Black smoke from the tail pipe means the engine is not getting any air like a dirty air filter. I think your mechanic is telling you is that you need a new turbo. The turbo boost incoming air pressure to the engine and if it is bad then it will not let enough air into the engine causing black smoke from the tail pipe.

Black smoke is excessive burnt fuel. White is excessive unburnt fuel. Have your turbo checked and the air filter. Good Luck

pump may need recalibrating or a kit through it
or you may have a cracked turbo

hi did you check the turbo,s housing where the turbine is for oil or signs of sooty deposits and when you had the hose off did you check the turbo,s intake pipes for blockages and check the air cleaner as well does the turbo make any wirring noises and is it petrol or diesel paul