you may need 2 to 4 batteries this depends on how the batteries are installed,but at the bottom end it takes 24 volts to turn starter motor
There is no such engine as a Cummins 2500 Diesel.
No.
Dodge started using the 5.9L Cummins engine in the 1989 model year.
In most cases yes, they use batteries to start the engine.
You can start an 18 wheeler with 3 batteries, but if the semi sits for 2 days or more it may not start, that is why they require 4 batteries, that forth battery will help start the engine even after a week of sitting, the reason for this, is because the ECM is always pulling power from the batteries.
Probable fuel system problem. Have it looked at by a trained mechanic.
The fuel system on a 2003 is self bleeding, just start cranking the engine.
A 24-valve Cummins engine may be hard to start due to several factors, including fuel delivery issues, such as clogged fuel filters or a failing fuel pump. Additionally, problems with the fuel injectors or the injection pump can lead to inadequate fuel atomization. Other potential causes include electrical issues, like weak batteries or faulty glow plugs, and low compression due to wear or damage in the engine. Diagnosing the specific issue often requires checking these components systematically.
The starter needs power to crank the engine to get it running. Once the engine is running however, the alternator generates enough power to keep it running. But with no reserved power (a battery) the car cannot turn over.
When the engine is on, batteries are being recharged. If you use a lot of electric power when the engine is off, you can drain your battery to the point where it will no longer be able to start your engine, and you will need to jump-start it.
For the starting, we'd need to know the symptoms. Maybe bad batteries or a bad starter. For power on the hills, try replacing your fuel filters.
A 8.3L Cummins engine that starts hard, runs rough until warm, and won't start when warm may be suffering from several issues. Potential causes include fuel system problems such as clogged filters, failing injectors, or a malfunctioning fuel pump, which can affect fuel delivery. Additionally, issues with the engine's heat management, such as a faulty thermostat or EGR system, can lead to rough running and hard starting. Lastly, electrical problems, such as weak batteries or poor connections, could also contribute to starting difficulties.