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Here is part one of a video that describes how to make a Electronic Fuel Injector Enhancer (EFIE) device that will maximize fuel economy from using an HHO generator.

Where to Purchase a EFIE device if you don’t want to make one

There are kits/instructions available from sites that will tell you how to make your own EFIE, but if you don’t have time or the skill to make one there are stores that sell already build EFIEs. If you have purchased an HHO kit or are considering it for a fuel injected vehicle, go to EFIE Devices, to get an already assembled EFIE device.