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Old 06-17-2008, 12:57 PM   #1
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Help, looking for LED meter to improve mileage

I am looking for something I read in a magazine this year. What it is is a 10 LED meter which is like a LED/digital vacuum gauge. The way it works is that at cruise or high vac. and easy acceleration it lights green. As your vac. drops it lights yellow and finally when vac is really low like WOT it lights red. Has anyone else seen this device? Help me out and and post where I can find one. Thanks. Cool site!
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Old 06-17-2008, 01:20 PM   #2
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Well you can do it as a 5V LED voltmeter and bargraph hooked to a MAP sensor, or a 12V ditto hooked to an injector wire through a 330uF capacitor, or a O2 sensor mixture reader... ... ...
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Old 06-17-2008, 01:51 PM   #3
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You an buy a mechanical vacuum/boost gauge doing the same thing...and more precise.
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Old 06-17-2008, 05:34 PM   #4
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Are you sure it was measuring vacuum? I've seen 10 LED bar graph gauges showing Air/Fuel Ratio (from the O2 sensor) and fuel injector duty cycle/fuel rate (from the fuel injector wire).
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Old 06-17-2008, 05:52 PM   #5
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I found it mentioned on this site the Digital Fuel Mizer. It looks like a great learning tool and can return it for a full refund up to 3 years. How could you go wrong. I also found a 10 LED A/F meter but I need it to do 0-5v so it can monitor the MAP sensor. Thanks for everyone's help and a great site.
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Old 06-17-2008, 08:24 PM   #6
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Quote:
Originally Posted by cobra marty View Post
the Digital Fuel Mizer
It's an accelerometer. It has no wires connected to your car. It alerts you if you accelerate or brake too suddenly.

Depending on how sensitive it is, if could have the effect of teaching you to avoid P&G.
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