Heat and pressure in the injection system can cause soot-like carbon particles to form in the fuel. These particles are small (on the order of 10 microns or less).
It is the high temp and the high return Pressure inside the injector that causes the fuel To turn black
It is a chemical process. The diesel gets compressed with air which in turn causes heat which in turn causes combustion.
turn up the fuel... signed::the Diesel Rednek
If its a Diesel, its probably the Diesel Stop switch. Located on the Diesel Fuel Pump.
yes
Turn the fuel down.
No diesel is a petroleum byproduct and is not water. If there had been water in the diesel fuel, it may separate after a freeze and thaw.
Turn down the fuel getting to the injectors.
http://flashoffroad.com/Diesel/injectionpump/mechanicalpump.htm
The fuel is shut off to shut the engine off.
Yes, gasoline and diesel engines are heat engines. The energy released by the burning fuel causes the gas in the cylinders to expand and push the pistons, which in turn do work.
That requires a "tuner", programmer, or "hot box".