worn out oil pump gears,housing,pump cover,oil pick up pipe cracked or seal worn out.
Most likely the problem is with the Pressure Sensor in the engine block.
There are several causes for high fuel consumption in a diesel engine. These include a difference in the weight of the vehicle, increased usage of air conditioning, and a difference in tire pressure.
Me because I am so hot
What are the causes and sources of vibration on diesel
Injectors, timing, low cylinder pressure.
Rather than introducing a spark to promote combustion, the diesel fuel is continually compressed in four cycles until it reaches a point where the pressure causes it to combust.
It's because of the pressure from the layers above causes the particles of iron and nickel to be tightly packed.
The problem is a leak inside the high pressure oil system. When it is hot the leak expands and causes the truck to not start.
causes of abnormal pressure
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.
Overheating, carbon buildup, defective fuel pressure regulator, defective injectors that are bleeding off.