I fuel injected this Honda GX160 with an Arduino based microcontroller with some parts I had laying around and some simple code.

Throttle Body Link:
https://drive.google.com/open?id=1kJv390D6uJ5pD0JWpeT9pnazdE43odrh

Code Link:
https://drive.google.com/open?id=1YSo8MLj00JJiocnheGda1vaPX6wvCvUX

Wiring Diagram:
https://drive.google.com/open?id=1EymIgFDHWD3N8L4MYgkSKj9OZCZ7dtBR

, https://i.ytimg.com/vi/QtJkBi3qf3Q/hqdefault.jpg

source

25 Comments

  1. Hey Sean, do you have a writeup somewhere about this? I'm trying to make one up for a single cylinder moped.

  2. Wouldnt mind seeing the jig you made to turn down the throttle plate. Quite tricky getting the angle right…

  3. Nice…i guess that pump can be upgraded to respond with pressure sensor that attach on the fuel line..so pump can maintain the pressure along the fuel line..

  4. Do you still have the print file for that intake ? I'm working on fuel injecting one of my GX160's.

  5. Nickelplatte the inside surfaces of the plastic throttle body, it will make it much more durable to gazoline.

  6. Sean N. Has the project evolved or is it still the same?

  7. Hi i have question how u connect that TPS you connect ground,+5volts and TPS output because i try use trottle body with golf mk3 that output on TPS is around 0.6 to 4.3 volts idk whether it will work?

  8. THIS is what I'm looking for 😀

    question: If I use a throttle body from a moped which already includes TPS and Injector (maybe a I'll buy a Honda BeAT throttle body). Will this enough for the system to work?

  9. Why not use the magneto as a source trigger and write an angular delay into your script to actuate your injector?

  10. Hi! Amazing! Can you write me your arduino's code for this type at Arduino?
    In the link there is a code but i don't read with the smartphone. Can you write me whit massages here? Or whith a comment.
    Thank you

  11. Is the code for any engine? like if i where to do this to a 420 predator? or does it have to be a certain injector

  12. What kind of injector did you use?
    Im planning on buildind an efi system for a turbo 2 stroke build.

    Thanks

  13. Not bad! Although, it does sound like it's starving for fuel during fast throttle transitions. Did you ever try to perfect the fuel vs. rpm mapping or anything like that later on? I was also curious about your code and i/o. Are you using interrupts or is all the control being handled in the main loop?

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