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 Hyundai XG350 BaseFACTORY OEM SERVICE PROCEDURE
Trouble Shooting Hints
- If the engine is hard to start when hot, check for fuel pressure and injector leaks.
- If the injectors do not operate when the engine is cranked, then check the followings:
- Defective power supply circuit to the PCM, faulty ground circuit
- Defective control relay
- Defective crankshaft position (CKP) sensor or camshaft position (CMP) sensor
- If there is any cylinder whose idle state remains unchanged when the fuel injectors are cut one after another during idling, check for the following items about that cylinder.
- Injector and harness
- Ignition plug and high tension cable
- Compression pressure
- If the injection system is OK but the injector drive time is out of specification, check for the following items.
- Poor combustion in the cylinder (faulty ignition plug, ignition coil, compression pressure, etc.)
- Loose EGR valve seating
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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