2017 Hyundai Elantra Gt upper engine knock

Discussion in 'General Motoring' started by Shawnamarie90, Apr 2, 2020.

  1. Shawnamarie90

    Shawnamarie90

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    What does it mean if the engine is knocking?
     
    Shawnamarie90, Apr 2, 2020
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  2. Shawnamarie90

    avisitor

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    It usually means the gasoline is firing early.
    A higher octane will help to reduce knocking
     
    avisitor, Apr 2, 2020
    #2
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