Honda high freq. noise at harsh acceleration. Don't know why.

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luketaopeng@gmail.com - 26 May 2006 08:18 GMT

My 1996 Honda Civic generates a high freq. droning rattling noise when
I press the acceleration hard. The noise sounds like a rotating
electrical fan knocking with a piece of paper... This noise disappear
if there is no harsh acceleration. I can't tell where this noise is
from... Today, this noise seems to get more noticeable than
yesterday... This is not good.. Does anybody know what could possibly
be the problem? Thanks a lot!

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TeGGeR® - 26 May 2006 13:36 GMT

> My 1996 Honda Civic generates a high freq. droning rattling noise when
> I press the acceleration hard. The noise sounds like a rotating
[quoted text clipped - 3 lines]
> yesterday... This is not good.. Does anybody know what could possibly
> be the problem? Thanks a lot!

Likely culprit is a loose heat shield on the exhaust. Somebody has to get
underneath and wiggle/tap them all to check.

You can tear it off, or clamp it im place with a large hose clamp.

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TeGGeR®

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Kevin - 26 May 2006 15:11 GMT

Does this noise occur if you rev the engine in neutral or does it only
happen if the engine is under a load?

If it occurs in neutral then it is most likely a rattling exhaust shield. If
it occurs only under a load then there is probably some malfunction causing
detonation or pinging. There can be a lot of things that might cause that,
and more information along with some diagnostic procedures would be needed
to find the cause.

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Kevin Mouton
Automotive Technology Instructor
"If women don't find you handsome, they should at least find you handy"
Red Green

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Scott Dorsey - 26 May 2006 17:01 GMT

>My 1996 Honda Civic generates a high freq. droning rattling noise when
>I press the acceleration hard. The noise sounds like a rotating
[quoted text clipped - 3 lines]
>yesterday... This is not good.. Does anybody know what could possibly
>be the problem? Thanks a lot!

Valve noise. How much mileage is on the engine?
--scott

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"C'est un Nagra. C'est suisse, et tres, tres precis."

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