By the way, Tracy's ECU can be powered through two different ways.  The original intended way and a sneak circuit way through the powering of the injectors.  I found this out when I wired a  switch to the EC2 CPU power terminal.  When I turned off the switch the EC2 did not turn off because the injectors still had voltage and there was a sneak circuit that kept the EC2 with DC power.  Tracy may  have eliminated that sneak circuit in later versions - but its there on mine.

 

Yes; I had noted that on mine as well – at least that the light would stay on if the injectors were on.  I don’t think I verified whether the engine would continue running with the ECU off.

 

Al

 

It will, but it can be rough.  Not meant to be intentionally done.

 

Tracy