Forum

[jefrs]

The current 500 EFi has an ECU driving everything. Can anyone please explain how the ignition timing works?

and can it be adjusted?

[Presto]

Ignition timing on EFIs is set by ‘registers’ on the flywheel which send signals to the ECU of crank position. The sensor scans 23 short protrusions and 1 long protrusion which is set 5 degrees BTC, this is its reference mark. It is not adjustable and should never have reason to be adjusted.

[jefrs]

Thanks Presto. I thought it might be the crank, didn't know the technical. I presume the ECU does the actual spark timing advance/retard according to its 'map'. I wonder how the Power Commander V (fitted) monkeys with that?