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As designs go, this has to be the laziest and cheapest fake engine tuner plug there is.
Most of these units try to look convincing by emulating data transfer with flickering LEDs, but this one has just one flashing LED with circuitry that hints that the designers didn't even know basic electronics.
Worse still, this unit manages to pass almost 20mA of current continuously to light its LEDs, that may not even be visible through the badly designed case. That current is significant for a vehicle that doesn't get used a lot.
These units pretend to interface with your cars control computer via the OBD (On Board Diagnostics) port normally used by mechanics to analyse vehicle faults. They claim that the unit learns your driving behaviour and fine tunes the engine settings for maximum efficiency and power. In reality while there are real units for very specific vehicles, these units just put on a light show and rely on the buyer to convince themselves that they feel a performance difference.
In some instances these units can have faults that actually interfere with your vehicles data networks and that can result in your car malfunctioning while the unit is plugged in.
Don't waste your money. If you really want to save fuel, try to adjust your driving style to avoid excessive acceleration and braking (hard braking is wasted energy), and avoid trying to accelerate uphill as that poses the highest strain on an engine.
On a plus note, the case could be useful for your own OBD projects to utilise the permanent 12V available at the socket.
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12 thoughts on “Worst fake obd fuel saver yet with schematic”
  1. Avataaar/Circle Created with python_avatars Gunhaver says:

    i want one that is just a piece of plastic that fits into the ODB 2 port. no lights, no resistors or mystery caps. just plastic. i'll say it was blessed by a shaman in the mountains somewhere and sell it for 5 bucks.

  2. Avataaar/Circle Created with python_avatars Phonotical says:

    Hmm, missing button, I wonder what it could have done (about as much as the other one 🤣)

  3. Avataaar/Circle Created with python_avatars zoon says:

    I've got one of these from ali for about 5$, it looks exactly the same as yours, but green (benzine cars), but mine looks totally different from inside: stack of two pcbs, 6 leds, 5v linear voltage stabilizer, MCU (40+ pins), oscillator, and some more resistors, a diode, capacitors, and a button. Have no idea if it actually works, haven't tried it yet.

  4. Avataaar/Circle Created with python_avatars Broadcast1Channel says:

    These things have been showing up again on a popular video streaming service pre-role adds again. Usually with some story about a person that worked at a big auto company who exposed that all auto manufacturers had been lying and that he had a simple fix that could double fuel economy, and when he approched big auto management they fired him. So he decided to go it alone and bring out this symple fuel saving device. Even with reporting these adds they still show up. Although they have now moved back on to little plug in fan heaters that can heat your entire house for little energy. Prior to this it was there favourite usb powered AC unit (evaporation cooler) that can cool a room by many degrees in minutes. All of these have a story attached about a person who big tech tried to silence.

  5. Avataaar/Circle Created with python_avatars Captain Chaos says:

    Do they make a version for my Tesla?

  6. Avataaar/Circle Created with python_avatars Franko Walker says:

    There's more in it than I expected. I thought it would be a resistor and a self flashing LED. LOL

  7. Avataaar/Circle Created with python_avatars alameachan says:

    So they wasted oil in the middle of an energy crisis to produce the plastics of a "product" that's only good for putting in a landfill.

    … we're so f*cked, as a species. *sigh

  8. Avataaar/Circle Created with python_avatars Rene Jensen says:

    where i live, these products are called 'idiot tax'

  9. Avataaar/Circle Created with python_avatars Hola! Cucumber Man says:

    I wonder if they’re going to “PRODUCE” one for electric cars ? I bet they do 😂😂😂😂
    Great video I can’t believe people for for this type of rubbish

  10. Avataaar/Circle Created with python_avatars eyes wide shut says:

    fuel saver lol, more like fuel eater, any extra demand on the alternator costs energy and your pocket….

  11. Avataaar/Circle Created with python_avatars RikTheMix says:

    To save time please place your OBD Eco device into a landfill site and consider how many Chinese have benefitted from you generous donation via E-Bay.

  12. Avataaar/Circle Created with python_avatars ts757arse says:

    I'm furious. I'm livid. I can't believe the arrogance. I patented this very circuit when I was 7. It to did nothing of value. THIEVES!

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