What would cause a catapiler 3406 run only on starter spray and not stay running?

If a Caterpillar 3406 engine only runs with starter spray and won't stay running, it may indicate a fuel delivery issue, such as a clogged fuel filter, faulty fuel pump, or injector problems. Additionally, there could be issues with the air intake system, such as a blocked air filter. Another possibility is a malfunctioning sensor or electrical issue affecting the engine's ability to maintain proper fuel-air mixture. Diagnosing these issues may require checking fuel pressure and inspecting the fuel system components.