P1284 – Fuel Rail Pressure Too Low
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Symptoms
- Hard starting
- Loss of power
- Hesitation
- High fuel trims
- Check engine light
Causes
- Weak fuel pump
- Clogged filter
- Fuel restriction
- Leaking lines
- Regulator fault
Diagnosis
- Measure fuel pressure
- Inspect filter
- Check lines for kinks
- Inspect for leaks
- Scan fuel trims
Repair
- Replace fuel pump
- Replace fuel filter
- Repair lines
- Replace regulator
- Clean fuel system