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Old 10-23-2008, 06:44 PM   #26 (permalink)
jomelmaldonado
Puerto Rican Hypermiler
 
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Join Date: Oct 2008
Location: Arecibo, Puerto Rico
Posts: 34

Toyota Echo - '05 Toyota Echo
90 day: 41.71 mpg (US)
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Hello again. I continue to work on the CC idea, I already found a used Ford Map Sensor, took it out of an Aerostar Van from a Junker. I bench tested it and it is producing an AC output signal. I powered it up with a 5 VDC Fixed Voltage Regulator from Radio Shack, it's the IC 7805 or Radio Shack Cat. # 276-1770. I have to use this because the sensor, like almost all sensors, works with a reference of 5 volts. I didn't like the idea of taking 5 volts from the car wire harness from an existing sensors like the TPS or MAP sensor, so to not strain the internal voltage regulator of my Suzuki Swift's ECM, I am using this external one. It's less than $2.00 and we assure not to put additional loads on the ECM. Tomorrow I am taking this setup to my University to bench test it again, but hooked up to a frequency counter or an oscilloscope to measure the exact frequency it is producing. I will also apply different vacuum levels to make a chart of Vacuum vs. Hz
I will be posting this information and photos probably on Saturday.

Any suggestions or ideas, please let me know.
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