Question for those with vacuum gauges

[Ilias Glavinas <eg1@ee.wustl.edu>]

I just installed my vacuum gauge and am experiencing some funny behavior. 
First of all, when the car is idling, the needle fluctuates by +/-2 in, 
and as a result makes an irritating sound. I don't suppose that is normal 
now, is it? Somebody told me it could be a sign of a valve not closing 
well. 

Secondly, when I am accelerating the needle does respond, but again it 
fluctuates while it rises/falls (again making the sound).

I 'd like to hear about the behavior of other listmembers' vacuum gauges 
(mine is a VDO, and I set it up the usual way, tapping off the 
usually-covered outlet just before the hose that goes to the booster). 

Could it be a defective gauge? (I hope so :-)


Ilias

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