How to Test a Fuel Pump?

Check the fuel pump fuse

Check the fuel pump relay

Listen for pump priming at key-on

Test fuel pressure with a fuel pressure gauge

Compare pressure to manufacturer specifications

Test fuel volume/flow

Check fuel pump electrical power at the connector

Check fuel pump ground at the connector

Perform a voltage drop test on the power circuit

Perform a voltage drop test on the ground circuit

Inspect the fuel pump wiring and connectors

Check for blown fuses or damaged relays again after testing

Scan for diagnostic trouble codes

Command the fuel pump on with a scan tool if available

Check fuel pump current draw with an ammeter

Inspect the fuel filter and fuel lines for restriction

Verify fuel tank level is adequate

Replace the fuel pump if pressure, flow, or electrical tests fail

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