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A Kettle Behind the Dash? (strange hissing sound) 200 1981

posted by  AdamBC on  Sat Apr 24 08:20 CST 2004
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last visit: Tue Apr 7 11:43 CST 2009
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My car is a 1981 242 B21F, 5-speed manual (m46).

I've been having the strangest problem...when I drive, I can hear a hissing sound behind the dash. It seems to emminate from behind the center console. It sounds like steam coming out of a kettle, not whistling, just hissing.

It seems to be tied to my RPM, that is, the higher my RPM, the louder the noise. For example, when I shift from 4th gear at about 4000RPM to 5th gear (dropping down to 2500 RPM or so), the sound goes from wooshing to almost non existent.

I suspect it may be some sort of vacuum leak, since most of the temp controls and vents are vacuum controlled, but how can I test this? Any ideas???

Thanks,

Adam C.






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New A Kettle Behind the Dash? (strange hissing sound) [200][1981]
posted by  AdamBC  on Sat Apr 24 08:20 CST 2004 >


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