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Vacuum Gauge - What is it telling me? 200

posted by  ricefive on  Mon Jan 26 04:16 CST 2004
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last visit: Mon Nov 29 07:33 CST 2010
[RELATED]

I would pull the gauge and snip a piece of vacuum line and go under the hood. I teed into the small line that comes right off of the top of the intake manifold that controls the vent selection.

If you unplug that hose and slip your tester hose and gauge you should get a consistent reading. If not you should consider that you have a bad gauge. I have about 16-18 at idle. I range 7-25 while driving.
--
1990 240- 245K- Original Owner-M-47, VX cam, IPD sprt springs, bilstiens, spt exh, euro lamps-turbo whls,- still slow but handles well- Near Houston






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