Figured out pretty quick not to reach out to anything other than a miata specific forum about this kind of thing. The only feedback I'm getting is people blasting me for not populating the entire board. :bang:

does the daughterboard cpu get stupid hot with power on?

Nope. Not even warm.

Pardon my stupids, but are these pins jumped on purpose?

https://cimg7.ibsrv.net/gimg/www.mia...acda788faf.jpg

It's not stupids. Yeah for NB2's the wiring harness needs to be jumped like that. It's specific to the trubokitty build.

It should update that, I just bridge in the db37.

I reached out to Peter Florance at PFTuning. He's gonna take a look at it. I need someone with more testing equipment and WAY more brain power than I do. :nuts:

just for S&G's ,remove that solder bridge. the purpose is to split the 12v input to power the MS into extra leads so you can power the vvt solenoid and idle vale because NBs power those up from the ECU. Just to confirm those are somehow causing a short on your 12v somewhere.

Does the 5 volt side drop out when the daughter board is connected? If you still have 5 volts when the daughter board is plugged in, you don't have a short; the problem is something else.

I just added that bridge recently while I was going over the board looking for problems, it wasn't working before I added it. I could remove it, but it's not the cause of the original issue.

I get 5v with CPU unplugged and 4.95v with the CPU in. My 12v drops from 12v to 11.87v when plugged in, so it must be drawing /something/ I found a more truthful wallwart that's giving me better voltage readings. I still only get a solid fp led.

That would suggest the CPU is OK. Does it respond to Port Check if you connect the boot jumper on the MS3 daughter board?

Nope. First one is with the MS3 daughterboard USB serial connector, Second is with a straight DB9 serial cable to DB9 port on desktop.https://cimg7.ibsrv.net/gimg/www.mia...d4b1b6d6de.pngMS3 usb
https://cimg9.ibsrv.net/gimg/www.mia...6f373211ea.pngDB9
Same https://cimg5.ibsrv.net/gimg/www.mia...2aacbeace4.jpgUSB
https://cimg4.ibsrv.net/gimg/www.mia...bc04ccc029.jpgDB9
Same solid fuel pump LED.

you're getting the FP light because that solder bridge is putting 12v on that pin. This mod is unique to have I do thing, and I should have elaborated on that a little in my writeup.

https://cimg4.ibsrv.net/gimg/www.mia...0269e0544d.png
https://cimg7.ibsrv.net/gimg/www.mia...e49b087cb3.jpgRemoved the bridge
https://cimg8.ibsrv.net/gimg/www.mia...62020c1994.jpgSame thing...
The flux is dark, the board isn't burnt. No continuity between any of the three pins now.

:(

wanna send it to me before Peter, Im much cheaper than he'd charge, I may be able to spot something and if not, i just send it along to him.

That what you tell all the girls? :jerkit: lol I went ahead and PM'd you.

Peter is good people and knows his shit. Live right near me but you right, you pay for his expertise.

Does anyone know how I might reach Brian other than pm? Not trying to be a pest but I haven't gotten a reply in two weeks. Last thing we were talking about was shipping arrangements to another person. I need to coordinate between 3 people.

I replied twice to you via pm about it... once to say I shipped to peter and like just yesterday to your last pm. peter's had it for like a week now...