I'll take a picture of what components need to be where and you can double check the board for errors.

Thanks Dimitris, I think that's what I need.

I've adjusted afterstart enrichment a bit and it idles much more smoothly from cold (it had been stalling after a couple seconds) and using VE live to smooth out the running. It still bucks and stumbles some at low speed rpms, but less. Working on it.

Still would like to fix the fuel pump circuit.

Pm me your mailing address and I'll send you the components you need to change.

I'm back from vacation.

Here's some photos of the MS2V3.

Perhaps you could point out anything amiss? Maybe point to the offending transistor? Not the greatest pictures, but I can take more if needed.

I need a better pic of the the area just behind the big black disc-like component on the second picture.

Moar:

And:

Everything seems to be in order...have a look at the two black transistors in there (labelled Q2 and Q19). Q2 should be a "ZTX450" and Q19 should be a "2N3904".

Oh wait...this resistor here is probably the culprit:

https://www.miataturbo.net/attachmen...1&d=1314028434

Replace it with a 1.0Ohm (one ohm), 1/2W resistor from Radio Shack (or temporarily remove it and replace it with a wire to test) and it should work.

looks like 270 in there. why you trolling!

Which would explain why it would work on the stim (which as a 30-70R relay) but not in the actual car.

:yippee: OK!

So, how hard would it be to switch the coil outputs while I'm at it?

swap the green and brown wires on the bottom of the board. why would you need to?

well...just so I don't get confused if I take off the new unit in the future and go back to stock. not important otherwise.

did you have to swap your coils to get running or something?

Yes. Coil output is reversed on the megasquirt, and the fuel pump didn't run, so it took a while for me to get it right as I would work on it a little while off and on when I had time, then put the OEM computer back in as it's the DD, etc. I meant to get this going a long time ago, so it will wait until colder weather for me to start working on the turbo hardware--I just like to drive the Miata in good weather, and my daughter is driving my Acura until school starts anyway.

the MS outputs look okay, it must be reveresed on the harness if anything.

Is that 1k Ohm, 1/2 Watt or 1 Ohm 1/2 Watt Resistor?

Good read. Good luck to getting all straight, there are some very knowledgable moderators up here