I am running simple Alpha N with ignition only.
I have the speeduino running from it's own independent power supply to remove PSU noise issues.
I have tunerstudio running with the 5v USB line disconnected again to reduce noise issues
My sensors logs look OK with IAT and CLT resistor grounded to give good readings.
The engine starts and runs for a short period. As far as I can see on a short log, the trigger log looks good.
Engine dies, tuner studio looses comms and needs to reset port to start again.
Speeduino needs power cycle then engine starts again.
If I run my speeduino on speedy sim it works forever.
There is still probably an ignition noise issue getting back in and it seems to lock the arduino up somehow and/or my VR conditioner is having an issue for some reason (it is a falling edge trigger from DIY-EFI). If I have a polarity issue there, what would be the symptom, given my trigger log looks good and why would it take out the serial line to tunerstudio?
If I disconnect the PC, the behavior is the same. Power reset and the engine runs again for a short period.
Below is my basic setup...