This happens outside, laptop sitting on the fender. I'm using the IOGear USB to serial converter recommended by MSD.
What's weird is that it's always the RPM signal that drops out, the boost signal is stable. Since it's a serial connection, you'd think that either both or neither would work if it's a connection problem. I tried another laptop, same thing.
No problems with programming, it's only with monitoring when running.
Cool setup btw, nice to have control over both centrifugal and vacuum advance - oops, run and boost retard.
Any ideas to troubleshoot, or just go for a replacement?