Common Symptoms
- Check engine light illuminated
- Rough idle or engine misfire
- Reduced engine power or hesitation
- Increased fuel consumption
- Strong fuel odor from exhaust
- Engine runs on seven cylinders
Most Likely Root Causes
- Faulty fuel injector on cylinder 8
- Open or shorted injector wiring harness
- Corroded or loose injector electrical connector
- Failed fuel injector driver circuit in PCM
- Damaged wiring from vibration or heat exposure
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Component Location
Cylinder 8 fuel injector is located on the engine block at the eighth cylinder position, typically rear driver side on V8 engines.
Manufacturer Notes
Some manufacturers use individual injector driver modules that can fail separately from the main PCM requiring module replacement.
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