[Liukas1992]

Hi, I just installed 0.4.4 in to mx5 vvt. ECU acts very unstable. For example if idle valve is set to work before start, fuel pump and some LED's activates randomly and if in this state I plug usb in to pc fuel pump starts pumping without stop and idle valve starts to sound much louder. If I disable idle before start, It all seams stable, but if I try to start engine, injector and spark output goes ~double speed and rps's is not stable. If I try to start engine without pc pluged in, engine starts more or less fine (on base tune). Also, sometimes fuel pump relay after priming flickers few times before switches off.
Feels like ecu picks all noise it can get, but why? any similar experience?
Not a expert in electronics, but it is not my first ecu install.

[Liukas1992]

https://www.youtube.com/watch?v=FW3HeJEWuSA

[theonewithin]

At work so can't see MSQ.

You need a log added as well ideally.

Correct board selected in engine constants?

[Liukas1992]

Yes, 0.4 board is selected.
.mlg file is in "mx5 what.zip", not sure why, but I can not directly upload .mlg file.
Update. Tried for a second to plug in pc while engine is running and it keeps running, but I can hear idle valve getting noisier.

[theonewithin]

Remove power from USB cable.

Is it a real arduino or a fake?

Have you tried an EEPROM clear and reload of firmware?

Where did you start your tune from? Supplied base tune?

[Liukas1992]

Will try to cut power from usb, but not all problems gone when usb is not pluged in, so it would not fully solve problem.

It is fake arduino. I have original one and I will try it today.

I reuploaded firmware using speedyloader, latest one 202103.

Used base tune for mx5 01-05 PNP and changed settings to suit my setup and speeduino v0.4.4.

[jonbill]

I think if you're using a 4.4 board, you should use the default tune, not an mx5 pnp tune. I think it has more thing set for the pnp boards than just the board selection.

[Liukas1992]

Tried original arduino, same thing, just acts crazy.
https://www.youtube.com/watch?v=kQoW_u_FIsM
Tried using generic base tune and reconfigure it for my setup, same thing.
Also noticed, on other speeduino 0.4.3 I remember component lm2940t (on board printed U1) was getting warm. On this one it is always cold.
edit: Checked lm2940t again, cold when pluged only to usb, warm when powered by car.

[theonewithin]

Have you done an EEPROM clear?

Tune/firmware corruption can do funky things.

[Liukas1992]

Have you done an EEPROM clear?

Tune/firmware corruption can do funky things.

If it is not the same as loading firmware using speedyloader, than no. But I have tried two different arduino boards.