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 Line Pressure Inspection
- Disconnect negative battery cable.
- Release fuel system pressure.
- Raise a vehicle.
- Install SST (OK2A1 131 001A) to fuel filter as shown in figure.
- Connect negative battery cable.
- Connect data link connector terminals FUEL PUMP and B+ with jumper wire.
- Turn ignition switch ON.
- Inspect the fuel line pressure.
Fuel line pressure:
46~51 psi (320~350 kPa, 3.2~3.5 kg/cm2 )
Pressure too high:
- Check for restricted fuel return line
- If line is clean, replace pressure regulator
Pressure too low:
- Clamp return line and check if pressure rises
- If pressure does rise, replace pressure regulator
- If pressure does not rise, measure fuel pump maximum pressure
- Turn ignition switch OFF and remove jumper wire.
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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