Megasquirt cutting out when it reaches 1500rpm

[etharooni]

My MS1 seems to chaotically restart when my engine gets just out of idle at around 1500rpm. The spark turns off and communication to my computer shuts off. It seems intermittent and it sometimes doesn't seem to happen at all.

I'm using MS1/Extra rev 029y4 on a v. 2.2 board. The engine is a Nissan SR20DE with the optical trigger wheel.

Here's a quick video of what I mean: https://www.youtube.com/watch?v=A7MQ3raEPI0

What causes this sort of behavior? Is it a bad ground or something that causes a lot of noise? Would shoving a decoupling capacitor close to the power pins make a difference?

Thanks!

[Matt Cramer]