Hi Chris,

Ed painted a pretty clear picture of why your serial link may be out.
I think one point Tracy made about the problem needs to be emphasized.
Without the serial link, you can't read anything from the EC2.  The MAP
may or may not be flat lined, and you may or may not be making changes
to it.  Without the serial link, you just aren't getting any data from
the EC2 to the EM2.  You may be getting RPM and fuel flow readings as
that data is read from the pulse to the rotor 1 primary fuel injector.

If the serial link were working, it would only provide MAP data from
the A controller.

Bob W.

On Tue, 28 Jul 2009 02:20:33 -0500
Christopher Barber <CBarber@TexasAttorney.net> wrote:

> I made it out to the hangar tonight and attempted to reset the EM2.  No
> joy.  It would not reset and I could not get it to accept any changes in
> the MAP table.  It is all flat lined.
>
> I will likely not get a chance to further investigate wires until I am
> off on Friday.  I did not see anything obvious other than the ground
> wire that was broken but I shall  investigate much  further.  Of course
> I am bothered but perhaps more concerned as to the why.  I do not want
> to send the unit back to Tracy again, just to hook it up and it blow
> again.  As I mentioned, the engine was running really well before I
> started concentrating on the planes finish.  I felt pretty good that
> after a couple of big set backs over the last two year that I was
> finally on track.  As a matter of fact, I felt this has been the first
> time I have actually been able to use the EM2/EC2 as it should be used
> since I can't blame the EC2 for coolant in my rotor housing or bad
> Jeffco in the tanks.
>
> So, to maybe ask a couple of obvious questions....could the one bad
> thick ground wire breaking completely "toast' the EC2?   I  know it is
> difficult to make hard and fast rules, but this seems pretty
> catastrophic for a single wire break. <yikes>  Also, if I change to
> Controller B, will I be looking at the MAP table for the B controller?  
> (if this is flagrantly stated in the manual, I have read past it as I
> focused on other issues).  Okay, I have a few more questions, but my
> brain is a bit too fried/disappointed to form them right now. <sigh again>
>
> So, uh, Tracy, do you have an old EC2 laying around I could buy, that
> way I can be trashing/working on one while your repair the other.  I am
> not kidding, you have any old stock of EC2's?
>
> All the best,
>
> Chris
> Houston
> >
>
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