Electronic Fuel Injection Fuel Injector Service
Injector problems typically fall into three general categories: electrical, dirty/clogged, or leakage.
Electrical Problems
- Check operational vibration while the engine is running at idle.
- Listen for buzzing or clicking sounds with a screwdriver or mechanic's stethoscope.
- Disconnect the electrical connector from an injector and observe changes in idle performance or injector noise/vibration.
NOTE: Do not apply voltage directly to the fuel injector(s) or ground them with the ignition on.
Wiring/Electrical Connection Check
If an injector is not operating, it could indicate a bad injector or wiring/electrical connection problem.
Injector Leakage
Injector leakage, though rare, can lead to hot restart problems and longer cranking times. Check for internal or external leakage.
Dirty/Clogged Injectors
While injector clogging is unlikely, symptoms may include rough idle, hesitation during acceleration, or fuel delivery fault codes. Contributing factors include dirty air filters, high operating temperatures, and poor quality fuel.
Preventative Measures: Use additives and higher grades of fuel if clogging has been a problem. Cleaning of clogged injectors is not recommended, they should be replaced.
