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What can cause a new fuel pump not to hum?

- Incorrect installation: Ensure that the fuel pump is properly installed and connected according to the vehicle's specifications.

- Electrical issues: Check for any loose or damaged wires, faulty relays, or a blown fuse that may be preventing power from reaching the fuel pump.

- Fuel filter: A clogged or dirty fuel filter can restrict fuel flow and affect the fuel pump's ability to function properly.

- Fuel pressure: Verify that the fuel pressure meets the recommended specifications. Low fuel pressure can indicate a problem with the fuel pump or other components in the fuel system.

- Faulty fuel pump: Even a new fuel pump can be defective. Consider testing the fuel pump directly by applying power to it to see if it operates.

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