VISUAL INSPECTION
Visually inspect all electrical wiring, looking for chafed, stretched, cut or pinched wiring. Ensure electrical connectors fit tightly and are not corroded. Ensure vacuum hoses are properly routed and are not pinched or cut. See VACUUM DIAGRAMS article to verify routing and connections (if necessary). Inspect air induction system for possible vacuum leaks.
Fuel Injector Inspection
- Warm up engine and let idle. Using screwdriver or stethoscope, listen to each injector. Clicking should be heard.
- If no sound is heard, measure resistance of each injector. Resistance should be 14.5 ohms at 68°F (20°C) for Sephia, or 12-16 ohms at 68°F (20°C) for Sportage. Replace injectors that do not meet specification.
- If injectors are okay, check wiring to injectors. Check voltages at Engine Control Module (ECM) terminals No. 3, 4, 31 and 32.
Fuel Injector Leakage Test
- Remove fuel injectors together with fuel rail. Using wire, secure fuel injectors to fuel rail. Leave harness connected to fuel injectors.
- Jumper Data Link Connector (DLC) terminals FUEL PUMP and B+. DLC is located left side of engine compartment. (Схема №1)
- Turn ignition on. Tilt injectors 60° and watch for leaks. Replace any injectors that leak. Use new "O" rings when installing injectors.
Fuel Injector Volume Test
- Remove fuel injectors together with fuel rail. Using wire, secure fuel injectors to fuel rail. Place end of injector to be tested in graduated cylinder.
- If using injector tester, connect injector tester between battery and injector. If not using injector tester, reconnect injector connectors. Connect jumper wire between injector to ECM wire and ground. See appropriate wiring diagram in WIRING DIAGRAMS for wire colors.
- Turn ignition on. Time injector flow and measure volume. Injector flow should be 4.4 oz. (130 ml) per minute. If volume is not as specified, replace injector. Use NEW "O" rings when installing injectors.