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 Delivery
Power to the fuel pump relay is supplied from the ignition switch when in the "ON" or "START" position, at which time the ECU supplies a ground for the fuel pump relay. When the relay contacts are closed, power is applied to the fuel pump.
Fuel is drawn through one end of a roller-type electric fuel pump, compressed and forced out the opposite end. Pump capacity is greater than the maximum engine consumption so that the pressure in the fuel system is always maintained.
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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.