P1239 – Fuel Pump Mechanical Fault
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Symptoms
- Loud pump noise
- Loss of power
- Hard starting
- Surging
- Check engine light
Causes
- Worn pump
- Cavitation
- Contaminated fuel
- Restricted pickup
- Low voltage supply
Diagnosis
- Listen to pump
- Measure fuel pressure
- Check current draw
- Inspect fuel for debris
- Inspect tank and pickup
Repair
- Replace fuel pump
- Clean tank
- Replace fuel filter
- Repair wiring
- Use quality fuel