Generally a sign of burning oil
If black smoke is coming out of the exhaust of a 1986 Ford Ranger, it is likely burning oil. It's possible that a seal is leaking in the engine.
Black smoke is a indication of an overly rich Fuel/Air mixture. Blue smoke is oil burning.
because its a terrible car mad , if the smoke is black the car wants to die , take it out of its miysery
Black smoke is an indication that the fuel/air mixture is far too rich. The black smoke is excess fuel being burnt.
It could.
Yes, this is simply showing your car is working, however, what SHOULD'NT come out of your exhaust pipe is red flames. If that is what's coming out, I'd check with mechanic. In general, Blue smoke, engine oil. Black smoke, excess fuel. White smoke, engine coolant.
sounds like a stuck fuel injector
No. which manifold gasket are you wanting to replace? Intake or exhaust?
rings are bad
Yes, the exhaust manifold on a 5.9 Cummins engine can come loose over time due to factors like thermal expansion and contraction, vibrations, and improper installation. Regular inspection and maintenance are important to ensure that the manifold bolts are properly torqued and secured. If you notice exhaust leaks or unusual noises, it's advisable to check the manifold for looseness or damage.
if it is white smoke engine need to rebuilt.
White smoke means head gasket, cracked head or equivelant.