Hyundai 31111-3S400 Pump-Fuel

You can Select Your Vehicle to check if 31111-3S400 fits your vehicle.

To remove the fuel pump, start by relieving the fuel system pressure and disconnecting the cable from the negative battery terminal. Remove the intercooler inlet hose and pipe on 1.4L and 1.6L models, or the air filter assembly and air inlet duct on 2.0L models. Take off the foam sound cover from the pump and disconnect the fuel pressure control valve electrical connector. Lift the plastic clamp cover from the low-pressure fuel inlet line and disconnect the fuel line quick-connect fitting. Loosen and disconnect the high-pressure feed pipe fittings using a flare-nut wrench. Disconnect the electrical connector from the engine coolant temperature sensor and remove the high-pressure feed line bracket bolt(s). Loosen the high-pressure fuel pump bolts and remove the pump, making sure to replace the bolts and O-ring. Remove the pump roller from the pump bore in the valve head cover and check it for smooth operation. To install the pump, make sure the camshaft lobe is at its base circle and lubricate the pump roller with engine oil. Align the tab on the roller body with the groove in the bore of the valve cover and install the roller. Lubricate the pump O-ring and set the pump onto the valve cover, then tighten the bolts alternately and evenly until the pump is seated. Finally, reconnect the electrical connector to the high-pressure pump, install the fuel pump fuse, and reconnect the cable to the negative battery terminal. Start the engine and check for fuel leaks.

Remove the fuel high pressure line flange bolt and loosen the fuel return hose clamp, then disconnect both the line and the hose.

First, relieve the system fuel pressure and disconnect the negative battery cable. Then, depending on the model year, either reconnect the fuel pump connector or reinstall the fuel pump fuse. For older models, locate the fuel filter and remove the cable tie that attaches the fuel pressure line to the fuel return line. Unplug the brake fluid level sensor electrical connector from the master cylinder. Put a shop rag around the fuel line retaining bolt on top of the fuel filter and remove the bolt to disconnect the fuel line. Connect a fuel pressure gauge to the fuel filter (or fuel rail for newer models) in place of the fuel line. Reconnect the negative battery cable, start the engine, and check for leaks. Measure the fuel pressure and compare it to the specified measurement. Finally, disconnect the vacuum line from the fuel pressure regulator - the fuel pressure should immediately increase. Measure the fuel pressure again and compare it to the specified measurement.