Fuel Injector Inspection
- Warm up engine and let idle. Using screwdriver or stethoscope, listen to each injector. Clicking sound should be heard. If no sound is heard, measure resistance of each injector. See Fig 1. Replace injectors that do not meet specification. To replace injectors, see appropriate FUEL DELIVERY PIPE & FUEL INJECTORS
under FUEL SYSTEM in REMOVAL & INSTALLATION article. If injectors are okay, and no operational sound is heard. Go to next step.
- Check wiring to injectors. Ensure electrical connectors fit tightly and are not corroded. For circuit testing, see appropriate wiring diagram under ENGINE PERFORMANCE in WIRING DIAGRAMS.
Courtesy of KIA MOTORS AMERICA, INC.