I'm currently running ~88% ethanol in the tank, notice this log screenshot where TPS @ 100% the ethanol percentage jumps from 88 to 99% which adds more Flex enrichment.
I also noticed the fuel temperature sometimes randomly jumps to very high or low temperatures for less than a second.
I have tried playing with the flex filter in tunerstudio, the recommended says 75, I have it at 150 and have tried all the way up to the maximum but too high and its too slow to react, I tried high filtering but after starting the engine it runs lean for a few seconds as the ethanol percentage slowly creeps up to the correct ethanol content.
Is this a noisy signal? I have the flex sensor powered from the same 12V positive & ground as the Speeduino.
I am running it in the feed line as there is no return line in this factory Toyota fuel system, I understand most run in the return line, but I know a lot of people will run it on the pressure feed line with no issues as long as it isn't a restriction, this won't be a restriction as its only factory making less than 100hp.
Can I place a resistor or capacitor of some sort in the flex sensor circuit without interfering with the signal it outputs?