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Strange induction noise on cold start up

Audiocholic

Member
First Name
Tim
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Jun 16, 2022
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Turkey
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2022 Civic Sedan 1.5 Turbo
Hi Guys,


have noticed a noticeably high tone induction noise that literally surpresses even the engine noise for the first 20seconds when the car is cold.
this is most noticeable when the car is parked in a garage and the hood is up and the noise quickly smooths down after 20seconds to normal levels.

with the hood open you can pin point the noise coming from the induction tube/box.


is this normal? do you guys notice the samething?
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Bunhyung

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Benjamin
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Maine, USA.
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'22 CBP ST
This is completely normal. Even very conspicuous with the hood closed.
 

CeeBee

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Yeah, I noticed that too in the garage in the morning. 🤷‍♂️.
 

Bunhyung

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Benjamin
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'22 CBP ST
Yeah, I noticed that too in the garage in the morning. 🤷‍♂️.
I personally have no problem with it as I have both a Toyota and a Mazda that use the AWS (accelerated warm-up system). which retards ignition 20 degrees so that fuel is burned in the exhaust manifold to accelerate Catalytic converter warming. It sounds horrendous for the first 20 -30 seconds and I thought The Mazda was gonna blow up the first time I heard it. It sounds like a gas powered washing machine filled with ball bearings on spin cycle.
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