Speeduino is now on Github Sponsors (Rather than Patreon): https://github.com/sponsors/noisymime
Any strange behaviour, crashing issues etc, post them here! Problems compiling the firmware should go in the General support section rather than here
By theonewithin
As above.

Not going to be a firmware bug.

Will most likely be a hardware issue (wiring, sensor or faulty Speeduino/Arduino).

One other possibility is corrupted firmware.

You could do an eeprom clear and reload firmware then base tune then re-enter all your settings.
By Marius222
Today I checked the wiring and tested the sensor, everything is fine.
How do I reload the firmware?
I tried speedyloader ant installed downgrade and no luck for me
By theonewithin
Once again as above.

You need to find and fix your actual problem.

Do you have a spare Arduino you can test?

Or some random resistors you can put in place of your sensor to see the result?

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