[Jason Rouillard]

I checked and my sensor is not loose.
Trigger wheel is integrated into crank shaft
Gm7x, yes it can be that but i am not first that use this decoder with speeduino.

I think it's can be the calculation of timing in speeduino. Gm7x it's not very accurate pattern.

I will try an other arduino to see if help.

[jonbill]

Does the gm7x decoder have per tooth ignition option? Might be worth trying the opposite value if it does.

[Jason Rouillard]

Does the gm7x decoder have per tooth ignition option? Might be worth trying the opposite value if it does.

I'm not sure I understand what you mean?

[jonbill]

In spark settings, there is an option of 'per tooth ignition' for some decoders. Maybe not gm7x...

[Jason Rouillard]

In spark settings, there is an option of 'per tooth ignition' for some decoders. Maybe not gm7x...

No

[jonbill]

Spark settings, not trigger settings.

[Jason Rouillard]

Spark settings, not trigger settings.

[Jason Rouillard]

I saw that my firmware version is 202108. It's old. Can this version cause this type of problem?

[jonbill]

Thats very old. Back then per tooth ignition was called new ignition mode. Try turning it on.
I'd upgrade to 202207.2 at least. (Although I don't recall any particular problem with 202108)

[Jason Rouillard]

Thats very old. Back then per tooth ignition was called new ignition mode. Try turning it on.
I'd upgrade to 202207.2 at least. (Although I don't recall any particular problem with 202108)

Yes i will try. What do the "new ignition mode" ?