Common Symptoms
- Rough idle or engine misfire
- Check Engine Light illuminated
- Poor fuel economy
- Loss of power or hesitation during acceleration
- Engine may run on reduced cylinders
Most Likely Root Causes
- Failed fuel injector on cylinder 3
- Damaged or chafed wiring to cylinder 3 injector
- Corroded or loose injector connector
- Shorted injector driver circuit in PCM
- Faulty fuel injector relay or power supply
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Component Location
Cylinder 3 fuel injector is located on the engine fuel rail at the third cylinder position according to manufacturer firing order.
Manufacturer Notes
Some manufacturers require injector replacement with updated part numbers due to known coil winding failures on specific engine families.
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