How do you tell if fuel pump is bad 1991 Jeep Comanche?

To determine if the fuel pump in a 1991 Jeep Comanche is bad, listen for a humming sound from the fuel tank when the ignition is turned on (but the engine isn't started). If there's no sound, it may indicate a faulty pump. Additionally, you can check the fuel pressure using a gauge; if it’s below the manufacturer's specifications, the pump may be failing. Lastly, if the engine cranks but doesn’t start, it could also suggest a fuel delivery issue.