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Posted (edited)

Hi Experts,

I am just curious, sometimes when I am waiting at traffic signals or waiting anywhere by running my Tarago 2010engine ON, the engine noise rapidly go high and slowly comes down (last less than 10 secs) even though my car AC is OFF.

Is this normal or could caused by any engine issues?

Please let me know.

Many thanks.

Edited by KMK
Posted

I suspect what you're hearing is the thermo fan kicking in and out. Are you watching the Tachometer during this event or is it purely an observational one ?

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