This thing that's clicking on my 200???

["Daniel Hussey" <dan_hussey@email.msn.com>]

Hey listers,

There's this little metal round thing with a plug hooked up to it that is
part of (or sits in) the intake boot just after the airbox and air flow
meter on my 89 200TQ.  This thing is clicking like crazy on my car!!!!  I
unplug it and the noise goes away and doesn't seem to affect performance.

Two questions.  What is this thing and what does it do?  And, can I just
leave it unplugged or should I replace it?

Later,
Dan