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Gary
Gary, ASE Certified Technician
Category: Chevy
Satisfied Customers: 739
Experience:  Senior Technician
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Bought a new corvette Z51 LT2 LAST WEEK AFTER STARTING THE

Customer Question

bought a new corvette Z51 LT2 LAST WEEK AFTER STARTING THE CAR WHEN QUICKLY HITTING THE GAS IT SEEMS THEIR IS A NOICE COMING FROM THE THROTTLE BODY THAT SOUNDS LIKE IT IS SUCKING WIND OR A POPPING SOUND THE DEALER SAYS ITS NORMAL WITH THAT ENGINE ITS NOT MEANT TO BE REVVED UP NO BODY ELSE BELIEVES THIS TO BE TRUE WHATS YOU OPINION
Submitted: 3 months ago.
Category: Chevy
Expert:  Gary replied 3 months ago.

Hi Michael,

Electronic throttle control, normal operation.

As the dealer has said.

They mean engines aren't meant to be revved up in neutral.

Can you hear this sound from the drivers seat?

Gary

Customer: replied 3 months ago.
outside the car
Expert:  Gary replied 3 months ago.

Does it have the factory airbox and ducting?

Have you compared yours to another car at the dealer?

Gary

Customer: replied 3 months ago.
outside the car also
Expert:  Gary replied 3 months ago.

So you had your car and another car side by side at the dealer?

And they say it is normal?

Gary

Customer: replied 3 months ago.
why the question
Customer: replied 3 months ago.
no i will do the side by side when i pick it up weds not sure about the air duct
Expert:  Gary replied 3 months ago.

Strange for the dealer to say it is normal, if a side by side hasn't been done yet.

Especially in your presence.

My bet is, there is something abnormal that the dealer won't admit to.

Gary

Customer: replied 3 months ago.
when you opened I thought you agreed with the dealer is there something that changed your mind can it be a faulty throttle body
Expert:  Gary replied 3 months ago.

I doubt the throttle body is faulty.

I think the airbox could have a leak though.

You then may hear unfiltered airflow.

Let's see what happens when two cars are side by side for comparison.

Make sure you are present when they do this.

Gary

Expert:  Gary replied 3 months ago.

Hi again,

How did you go with your dealer?

I hope my advice has been of assistance to you.

Kind regards

Gary

Customer: replied 3 months ago.
It seems that all new corvettes have the computer set not to allow you to reve the engine it will shut off at 500 miles w 1st service
Expert:  Gary replied 3 months ago.

Well that seems fair enough.

But many cars are programmed to not rev beyond 3000-4000 rpm in neutral.

Lets see what you think after the 1st service.

Hope they remember to do the set/reset programming.

Hope it all goes well for you now.

Gary

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