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.
2004 Pontiac Sunfire AutomaticFACTORY OEM SERVICE PROCEDURE
Removal Procedure
- Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
- Remove the engine fuel supply and return pipes. Refer to Fuel Hose/Pipes Replacement - Engine Compartment .
- Remove the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .
- Disconnect the vent pipe from the fuel pressure regulator.
- Remove the fuel pressure regulator bolt (1).
- Remove the fuel pressure regulator.
- Disconnect the fuel injector harness connectors.
- Remove the fuel rail attaching studs (1).
Factory Service Tools
Use the Manual With the Right Hardware
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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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