EMS D10 - Need Help

[SaroDude]

I bought a used EMS D10. I fear the worst....

* Unit keeps clicking. Is this normal?

* What EGT / CHT values should I expect with the DB25 connector removed? There are no thermocouples connected to my unit but the temps jump all over.

To troubleshoot, I connected ONLY the +12 and ground straight to battery. Same deal - still clicking and still bouncy / jumpy temp readings.

Help!

 

[dynonsupport]

Clicking is normal. It's an internal self calibration.

Disconnected thermocouples will just be noise. They are millivolt signals and without wires hooked up, you will just get random noise.

Everything sounds fine.

 

[SaroDude]

The EGTs were nuts with EGT probes connected as well. I was unable to get those readings to be stable.

What can I try to know for sure if I have a problem?

-Saro

 

[SaroDude]

Maybe I should also ask this... What are normal random noise readings? -99 to 9999?

4 EGTs hooked up still gave me random looking garbage.

-Saro

 

[dynonsupport]

Well, the EGT's should be stable with the sensors plugged in. Are you using a Dynon made harness or one you made yourself?

Normal noise readings can be anything from -99F to +1999F. It's really hard for all of the EGT's and CHT's to fail together while also giving you readings that are changing, so there is likely a wiring issue.

 

[SaroDude]

The Dynon harnesses were hacked up by the previous owner.

I'd initially bought Dynon EGT / CHT probes, but they didn't fit my installation. They were returned and I kept the spark plug mounted CHTs and bought 4 new EGT probes - both types being Westberg / Westach. I bought the little barrel (.093"? .090"?) pin & barrel connectors from them.

The (made by me) harness is made with shielded ETFE wire.

Tonight I'll try rigging 1 par of wire to 1 EGT sensor and only having power / ground applied to see if I can get a stable reading on 1 EGT. Four wires total.

-Saro

 

[dynonsupport]

The easiest test is actually to short out an EGT or CHT input with normal wire. If you do this, you should read a nice stable temperature that is the temperature of the EMS unit. You can just make a short jumper with two DSUB pins and push it into the pins without needing a harness or anything else.

 

[SaroDude]

https://www.youtube.com/watch?v=NMstLYgUDmk

Same result on any shorted pair of pins. Interestingly, for a brief spell, all readings dropped to super low / steady values. That didn't last.

:-[

 

[dynonsupport]

The video is helpful. It looks like you are plugged into pins 9 and 21, is that correct? That should be EGT3.

If you are, then the D10 does appear to be broken. You should contact us direct via email or phone and we can discuss repair options.

 

[SaroDude]

For the video, yes, it was EGT3. I tried it on all the EGT pairs with the same result.

I will contact support tomorrow. Thanks for the help. Bummed but greatful...

-Saro

 

[SaroDude]

Wanted to close the loop on this.

I can only give Dynon a score of 13 out of a possible 10 for service and support. Couldn't quite crank it up to 17 because they didn't send a magic fairy to pick up & deliver my broken EMS D10.

Seriously, starting from the after hours response on this board to the rapid replies to emails to the rapid turnaround of my EMS, Dynon is beyond fantastic.

My EMS is now responding more appropriately to sensor inputs.

-Saro