What should the fuel pressure be of a 2005 dodge cummins?

The fuel pressure for a 2005 Dodge Cummins varies depending on engine load and operating conditions. There isn't one single "correct" number. However, a good general range to aim for at idle is between 10-15 PSI. Pressure will significantly increase under load.

It's crucial to consult your owner's manual or a reliable repair manual specific to your 2005 Dodge Cummins engine (e.g., 5.9L or 6.7L - they differ). These manuals will provide the most accurate specifications and testing procedures for fuel pressure in various situations. Simply relying on a general range is not sufficient for accurate diagnosis.

Trying to measure fuel pressure yourself requires specialized tools and knowledge. Incorrectly measuring or adjusting fuel pressure can cause serious engine damage. If you suspect a fuel pressure problem, it's best to have a qualified mechanic diagnose and repair the issue.