[T3] Engine noise

["Daniel Baum" <daniel@type34.info>]

<x-flowed windows-1255>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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