Release fuel pressure. See FUEL PRESSURE RELEASE . Disconnect battery negative cable. Install Fuel Pressure Gauge (0K2A1 131 001) on service port at center of fuel rail. See Fig 1.
Connect battery negative cable. To operate fuel pump, jumper DLC terminals FUEL PUMP and (B+). DLC is located on left side of engine compartment. See Figure.
Turn ignition on for 10 seconds or less. Check fuel pressure. See FUEL PRESSURE SPECIFICATIONS table. Turn ignition off and remove jumper wire.
If fuel pressure is too high, check for restricted return line. If return line is open, replace pressure regulator. See FUEL PRESSURE REGULATOR under FUEL SYSTEM in REMOVAL & INSTALLATION article.
If fuel pressure is too low, block return line. Operate fuel pump again and see if pressure rises. If pressure rises, replace fuel pressure regulator. See FUEL PRESSURE REGULATOR under FUEL SYSTEM in REMOVAL & INSTALLATION article. If pressure does not rise, check fuel pump maximum pressure. See MAXIMUM FUEL PRESSURE (RIO & SPECTRA) .

Fig 1: Installing Fuel Pressure Gauge (Spectra)

Courtesy of KIA MOTORS AMERICA, INC.

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.

Safety Warning

Fuel Pressure (Spectra)