Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fuel Pump Flow Test
If fuel flow or supply problem is suspected, perform following:
- Turn ignition off. Ensure A/C is off (if equipped). Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Remove fuel feed pipe to fuel rail. Place fuel feed pipe into an appropriate sized clean container. Connect Tech 2 or equivalent scan tool to Data Link Connector (DLC). DLC is located under small cover on left side of dash. Turn ignition on. Using scan tool, command fuel pump On.
- Fuel pump should run, and in 15 seconds deliver at least .40 qts. (.38 ltrs.). If fuel pump does not perform as specified, check for plugged fuel filter, kinked or blocked fuel lines. If problem is found, repair as necessary. After repair, recheck fuel pump delivery.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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