This is all normal David.  The EC2 getting power through the injectors is a side effect of the voltage spike protection circuitry inside the EC2.

  As an interesting aside,  Mark Kirkpatrick called yesterday to report that he had an in-flight failure of some sort.  The engine quit and he switched to B controller.  The engine ran but mixture was lean so he corrected with the mixture control and landed at his intended airport which was close by.   While taxiing to the hangar he noticed that the circuit breaker to the EC2 was in the off position.  The only reason the EC2 continued to function was the power feed back through the injectors.  You can imagine how dirty the power was since the EC2 was constantly switching the injectors on & off.   Mark also switched back to A controller and it ran OK.

This was not an intended fail-safe feature of the EC2 but it might have saved Mark and his plane on this occasion.  No word yet on why the breaker blew.  It was either a 2 or 10 amp breaker.  The EC2 uses less than .25 amp.  

This is another illustration of why you need to have a *well rehearsed* emergency checklist.

Tracy Crook