P1323 – Fuel Pressure Regulator Range/Performance
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Symptoms
- Hard starting
- Stalling
- Rough idle
- Poor fuel economy
Causes
- Stuck regulator
- Weak spring
- Contaminated regulator
- Vacuum line issue
Diagnosis
- Measure fuel pressure
- Check regulator vacuum
- Inspect return line
- Scan ECU data
Repair
- Replace regulator
- Repair vacuum line
- Clean fuel system