How to diagnose Fuel Pump noise issues?
According to the 2024 auto research report of J.D. Power, the investigation of abnormal Fuel Pump noise should be combined with audio frequency characteristics: The normal high-frequency noise range is usually 2000-3000Hz (decibel level ≤50dB). If a sharp noise above 4000Hz is perceived (e.g., ±6Hz frequency deviation as demonstrated in the caliper experiment), it may …