MoTeC Global Forum

Is it possible to close the fuel injectors fully on decell?

Adjust->Functions->Overrun Fuel Cut is where you configure that.

Did you see the note in the help that overrun fuel cut won't be active if the Engine Temp is less than 50 degC (122degF)?

Are you looking at the fact that it still shows a small injector duty cycle even when the injector cut is on? I don't know of a way of getting rid of that, and I am not sure why it is there.

Hi guys,

Thanks for the replies

I do have the injector cut active, it now matter how I set the parameters the injectors not not shut fully. Also after a period the injector pulse width increases and is accompanied by loud banging in the exhaust.

Below is a screenshot showing the problem

Whats your idle activate rpm set at?

Hi russ

Idle activate rpm is set to 1800

I don't have an idle valve, I have itbs with the idle controlled with ign comp.

Is the injector pulse modified on return to idle ?

Hello

Could be wrong but suspect overrun fuel cut will turn off when rpm drops back into idle area.

Thanks I'll try lowering the rpm

Any chance your Injector Battery compensation is 840 uSec at that voltage/pressure? You are looking at actual pulse width, (not effective pulse width) and I would expect the the injector dead times would be included in this pulse width.