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.
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HOMESERVICE MANUALSHYUNDAI2013GENESIS COUPE 2.0T PREMIUMREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 43 (ENGINE CONTROL SYSTEM (DTC TROUBLESHOOTING) (2 OF 3) - 2.0L)DTC P0300: RANDOM/MULTIPLE CYLINDER MISFIRE DETECTEDFUEL SYSTEM INSPECTION
2013 Hyundai Genesis Coupe 2.0T Premium
Fuel System Inspection
2013 Hyundai Genesis Coupe 2.0T PremiumSECTION Fuel System Inspection
WARNING: This page is about a different car, the 2012 Hyundai Genesis Coupe. However, it is still accessible from the selected car via links, so may be relevant.
- Fuel Line Pressure Inspection
- Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
- Install a fuel pressure gage
- Inspect fuel pressure with normal idle status
Specification: 338~348kPa (3.45~3.55kg/cm2 )
- Is fuel pressure within the specified value?
YES
- Go to next step.
NO
- Inspect the suspected area. Refer to the following table. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.FUEL LINE PRESSURE INSPECTION CHART
Condition Possible Cause Suspected Area Fuel Pressure too low Clogged fuel filter Fuel filter Fuel leak on the fuel-pressure regulator that is assembled on fuel pump Fuel Pump (Fuel Pressure Regulator) Fuel Pressure too High Sticking fuel pressure regulator Fuel Pump (Fuel Pressure Regulator)
- Fuel Pressure Hold Inspection
- Stop the engine and check for a change in the fuel pressure gauge reading.
Specification: After engine stops, the gauge reading should hold for minimum 5 minutes
- Is fuel pressure within the specified value?
YES
- Go to ENGINE COMPRESSION TEST .
NO
- Inspect the suspected area. Refer to the following table. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.FUEL PRESSURE HOLD INSPECTION CHART
Condition Possible Cause Suspected Area Fuel pressure drops slowly Injector leak Injector Fuel pressure drops immediately tuck open in check valve of the fuel pump Fuel pump
- Stop the engine and check for a change in the fuel pressure gauge reading.
RENDER: 1.0x
NO RELATED
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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.