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Freds404

Vacuum Gauge

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Thought somebody might find this useful if you are having vacuum issues and want to learn a little more about your engine. You can make one of these with some fuel hose slipped onto an over the counter vacuum gauge, super cheap.

 

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...my Brat holds steady at 20, I dont know if that is typical or not though for these cars.

Edited by Freds404
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It is the least loved yet cheapest and one of the more informative diagbnostic tools there is, long before puter or engine analyzers.

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for fuel injected cars a vacuum gauge like this is still useful, correct? 

Yes, since it also diagnoses mechanical stuff, like valves, rings, collapsed clogged exhaust.

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Lol, if you're high altitude, you may need to adjust those reds and greens.  16 inches ain't too bad around here.  I don't think I ever seen one hit 22, outside of snap-closed-throttle.

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Vaacum guages are great tools, Mine however is somewhat exotic it initially saw service in the cockpit of a WW2 P400 Aircobra in the South Pacific brilliant bit of gear for diagnosis work though and even a cheapy is worth the effort they will save you countless hours when diagnosing problems.

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I have mine permanently under the hood.  The needle is a little shakey when cold but when warmed up it sits solidly on 21" at idle.  I also love my Wideband O2 sensor.

 

Both these tools are excellent for tuning and diagnosis.post-24616-0-03647300-1408756619_thumb.jpgpost-24616-0-70370800-1408756632_thumb.jpgpost-24616-0-07808700-1408756644_thumb.jpg

Edited by Dirk

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