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Message: <blockquote data-quote="Rednaxs60" data-source="post: 227135" data-attributes="member: 4617">Had an epiphany regarding the no spark or tach.  The Speeduino requires a digital signal for the cam/crank signals.  The crank sensor is VR.  The cam sensor is a Hall effect sensor with a VR output.  The Speeduino interface board has 4 pins to select from.  Two for Hall effect signals - digital square wave, and two for VR signals.Had the cam/crank signals connected to the pins that bypass the VR conditioner board.  Have changed these so that the VR signals go through the VR conditioner.   Hopefully this will get better results, maybe a tach readout, and a "burp" on engine firing. Have to do the vacuum hose mod that I gleaned from socrace's FI conversion. Have to remember that the pin selection for any reassignment such as the pin selection for the fuel pump has to be the Arduino MEGA 2560 pin selection.  This is because the Arduino MEGA 2560 is the CPU/brains of the ECU, the Speeduino board v0.4.4 is an interface board between the system and CPU (Arduino MEGA 2560).Put the LifePo4 battery on charge. It has come up to a full state of charge.  It has a built in BMS.</blockquote>