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.
2003 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
Fuel Injector: Installation
WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
- Lightly lubricate the fuel injector O-rings with a couple drops of clean engine oil.
- Install retaining clips on fuel injectors.
- Push injectors into fuel injector rail until clips are in the correct position.
- Position fuel rail over cylinder heads, and push rail into place. Tighten fuel rail mounting bolts to 28 N.m (250 in. lbs.) torque.
- Connect the fuel supply tube quick connect fitting to the fuel rail. .
- Connect the electrical connectors to the fuel injectors.
- Install intake manifold plenum, (Refer to INTAKE MANIFOLD .
- Connect negative cable to battery.
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.