Common Symptoms
- Check Engine Light illuminated
- Rough idle or engine misfire on cylinder 8
- Loss of power or hesitation under acceleration
- Poor fuel economy
- Engine running rough especially at cold start
- Black smoke from exhaust under load
Most Likely Root Causes
- Faulty fuel injector on cylinder 8
- Damaged or chafed wiring harness to cylinder 8 injector
- Corroded or loose injector connector
- Failed injector driver circuit in ECM
- Shorted injector coil winding
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Component Location
Cylinder 8 fuel injector is located on the cylinder head at the number 8 cylinder position, typically on the driver or passenger side depending on engine configuration.
Manufacturer Notes
Some manufacturers require injector replacement in pairs or banks to maintain proper fuel delivery balance across cylinders.
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