If it only happens when you accelerate the most likely cause is an axle.
A faulty fuel pump would cause your Navigator to hesitate when you accelerate. Bad gasoline could also be at fault.
Already been done. Diesel Particulate Filters and Diesel Exhaust Fluid.
some black smoke is normal, however, if you think yours is smoking more than normal, have the timing of your injection pump checked, you could be dumping too much fuel.... The heavier you accelerate the more smoke you'll make regardless of injection pump settings so get the injectors right and lay off the pedal.
No. Beer, cola, and dark chocolate cannot accelerate menstruation. Stress can cause a cycle to come sooner, but food and beverage do not accelerate it.
water
They could be a cause, but you should get checked. Black feces could mean internal bleeding
Nothing could happen if you swallow diesel fuel. This fuel is poison and will cause you to get sick.
Maybe low coolant level
You could have a slipping clutch which is not transmitting the drive correctly.
Could be a very dirty fuel filter or incorrect fuel pressure.
Black smoke from diesel engines on starting and/or running tends to mean there is fuel leaking into the engine, or the fuel mix is incorrect and not atomised correctly. The main causes are normally a nakered air filter that isn't letting enough clean air into the engine to mix with the diesel, a blocked fuel filter, which is either not letting enough fuel in, or in some cases, a faulty fuel filter which is letting too much diesel into the engine, and causing black smoke due to excess burning. The last cause could be the engine's fuel injector which should normally create a fine mist spray of diesel to be burnt. if its faulty it could either not be spraying enough fuel into the chamber, or too much.