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Engine Controller V4

This is the version 4 of my old ECU with new features! The microcontroller can be shrunk down to 3x3 by removing the optional inputs/outputs.

Features:
- Perfectly optimal air to fuel ratio.
- Overheat protection
- Desired temperature adjusting with a pump output.
- Control engine with a throttle from 0-1 or rps input.
- Integrated composite to temp.
- Integrated rps limiter with smooth and absolute mode.
- Engine diagnostic tool to tell you why your engine wont start.