Q: How to Replace Fuel Injectors and Fuel Rail on a Kia Sorento?A: Depressurize the fuel and disconnect the battery. Remove the engine cover, air intake duct, and filter housing. Remove the upper intake manifold. Disconnect the high-pressure fuel pipe and line from the fuel rail. Disconnect the electrical connectors, then take out the rail bolts, retaining clips, and injectors. Replace the seals, grommets, and O-rings. Remove the old Teflon sealing ring and upper O-ring from each injector. Clean the seal groove and injector shaft. Install a new Teflon seal. Lubricate and install a new upper O-ring. Clean injector bores and insert injectors into the fuel rail. Install new retaining clips. Install injectors and fuel rail assembly on the cylinder head. Tighten new fuel rail bolts.