Hi Bobby

Thanks very much for finding this for me.
I think this is different from the mod to my EC2.
They are directly to the pins of the DB37 and I think are between the pri and backup CAS inputs and Common/Ground.
We flew on Wed with the EC2 and the engine performed flawlessly. The 100nF on the A MAP sensor has fixed the EMI problem.
Just needs some attention to tuning the MCT’s.
I might set up a camera to record the EM3 in Track mode so I can go back and see the various RPM, MAP, O2 readings and corresponding table addresses/data being used.

I haven’t done any further testing on the EC3.
I wonder if there is more than one version of the EC3 circuit.

Thanks again

Steve


> On 30 Jan 2020, at 11:46 pm, Bobby J. Hughes bhughes@qnsi.net <flyrotary@lancaironline.net> wrote:
>
> <Renesis CAS Zener Circuit.pdf>