Re: [T3] Engine noise

["Jim Showker" <jshowker@comcast.net>]

<x-charset windows-1255>Sounds like detonation to me.  Very serious.  Back off the throttle til it
stops when you hear it.

To Check if this is indeed your problem, buy premium the next time you fill
up.  If the problem goes away, it is indeed detonation.

Then try a different brand of regular or buy the medium grade of gas and see
if that stops it too.

Jim showker


----- Original Message ----- 
From: "Daniel Baum" <daniel@type34.info>
To: <type3@vwtype3.org>
Sent: Thursday, June 09, 2005 12:39 PM
Subject: [T3] Engine noise


> Hi all,
>
> Ever since I have been driving my car, it has always made a certain noise
> under certain conditions, and I have never been able to find out what it
is.
>
> It's a kind of rustling or rattling noise that starts when going up a
steep
> hill at almost-full throttle in third (i.e. top) gear. If I lift off the
> throttle slightly it will stop. Also, downshifting will stop it
altogether.
> Once it has started doing it, it will carry on doing it whenever I have
use
> slightly higher than usual throttle  - even on much less steep hills -
until
> I stop the car. Again, downshifting will stop it. The engine doesn't seem
to
> be running too hot.
>
> It has always done it. Timing doesn't seem to affect it, since I have
> retarded my timing quite recently when I started using a strobe timing
> light. Changing the exhaust didn't stop it, and neither did the last batch
> of work that I did on the engine, so it isn't rattling tin or the fan.
>
> There is no noticeable effect on performance when it makes this noise, but
> it bothers me because I don't know what it is.
>
> Does anyone have any idea?
>
>
> Daniel
>
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