P1143 – Fuel Air Metering System High Input
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Symptoms
- Rough idle
- Hesitation
- Poor acceleration
- Black smoke
- Check engine light
Causes
- Faulty sensor
- Rich mixture
- Wiring issue
- Injector leak
- ECU issue
Diagnosis
- Inspect wiring
- Test sensor voltage
- Inspect injectors
- Scan live data
- Check fuel trims
Repair
- Replace sensor
- Repair wiring
- Replace injectors
- Address rich mixture
- Update ECU