There are many manufacturers, and many different engines. Typically, they're attached to the air compressor.
on average you need to fuel an 18 wheeler once a day
About 8000
Anywhere between 100 and 300 gallons.
In the range 2,000 to 2,500
Could be anywhere from 100 to 300 gallons.
Blown fuse, defective fuel pump relay, clogged fuel filter, or defective fuel pump. Your vehicle is 18 years old, so it is likely the pump is bad.
18 wheeler has the higher gross weight
the pump is in your fuel tank to take the straps down you will need a 18 mm deepwell socket and a flat screwdriver and a small hammer for fuel pump removal
Between four and nine, dependent on a number of factors.
If there is fuel in the tank and it is making it's way to the fuel pump, and the fuel pump will not pump fuel, the pump is obviously defective. Replace the fuel pump with a new one.
The fuel pump switch is what tells the fuel pump what pressure to pump fuel into the fuel rail
1/4 to 1/8th of a gallon, all factors dependent.