Learning what not to do.....Megasquirt 3

[Aiming Faster]

Hi Everybody,
I have an NB8A with a MS3 and ITBs.
The car was always running a startup tune since I got it a month ago, and my "refining" the tune/dashboard/firmware (update to 1.3.2a) has caused engine boiling and now no spark. Would the lack of spark be from changing "Tools" settings?
I did play with a bunch of things, so can't really relay clearly the sequence. I did revert to firmware 1.2.4, and the original tune, but I may have damaged the tune too.
If I can get it running ok for this Sunday's driving school, that would be great as a first base, then proper settings/tuning for smoother running and idle bypass valve next.

Further to my previous note, I checked all fuses, all good.
Then I connected the original(?) ECU and it runs, sluggish as it did with that ECU when I tried it weeks ago. The Tacho works again now too!

Another clue; The gauges for coolant and intake air temp are way up, 130 deg coolant, 40 deg air (without being able to run the engine!) outside 18 deg.
Would appreciate any assistance available, thanks.

I'm in Perth, (Rivervale WA).
No RPM showing on Tacho or Realtime view while cranking using MS3, Tacho and motor work using Mazda ECU.
Thanks, Derek.