car engine makes rattling sound under acceleration

The Engine Makes Noise When Accelerating- Diagnosis and Solving the Issue

By anantamodak

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1) Pre-ignition / detonation / “pinging” (spark knock) Sound: A metallic pinging or rattling, usually at light to medium throttle. Often more noticeable under load/acceleration.Why: Fuel-air mixture ignites too early or unevenly — low octane fuel,…