Common Symptoms
- Check engine light illuminated
- Rough idle or engine misfire on cylinder 7
- Loss of power or hesitation during acceleration
- Increased fuel consumption
- Engine may run on seven cylinders
- Black smoke from exhaust under load
Most Likely Root Causes
- Faulty fuel injector on cylinder 7
- Shorted injector wiring harness or connector
- Damaged or corroded injector connector pins
- Failed fuel injector driver circuit in PCM
- Chafed wiring causing short to voltage
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Component Location
Cylinder 7 fuel injector is located on the engine block at the seventh cylinder position in the firing order.
Manufacturer Notes
Some vehicles may require PCM replacement if internal injector driver circuit has failed causing high circuit condition.
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