Quote:
Originally Posted by pancake
I am very curious about how you went about making one O.O
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Basically you use a GM flex fuel sensor that outputs 50-150hz based on the level of flex fuel detected and an arduino programmed to take that frequency signal and convert it to a voltage output that the ECU can use along with a FF tune to adjust the fueling and timing for FF.
In my case I also wanted a readout so I used an lcd readout for arduino and an arduino nano.
I was able to find both a FF sensor with fuel lines on ebay and then also a pnp harness so I didn't have to cut any wires for a very good price. Although it's perfectly possible to buy all of the stuff separately.
The pnp harness is like $90 new and the sensor is like $50. You can get the fuel lines and connectors as well. Not sure on the prices off the top of my head.
I bought the arduino nano for less than $10 and the lcd for $6.
I'm more than willing to share the code I have with anyone who wants it.
Also I'd be willing to put something together for you preprogrammed and ready to go for a little more as well. Or I can just prepare the arduino analyzer by itself.
There is some variation in the sensors and for mine I had to tune the calculations in the arduino code a bit to get it to read 100% accurate.
Jaden
I put mine in a location that is different than what most people do in the engine bay because I'm going for a total stealth approach.
When you look in my engine bay, you wouldn't know that it has flex fuel except for one blue and black fitting.