Knocking on recommended fuel

35

Asked by Jul 05, 2019 at 03:15 PM about the 2015 Kia Optima

Question type: Maintenance & Repair

When a car engine knocks on recommended octane rating,
what part/sensor would be the problem?
I have remapped the ecu. It has improved but the noise is
still there.
The knocking sound goes away and performance improves
when using Octane boosters higher than 8point.

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