Self Adjusting ECU

[Jerryd]

Maybe the Subject Line could be different, but my question is whether the ECU in a Norge will compensate to a minor change in the silencer. For instance, will taking the DB Killer out of my Mistral cause an issue without a reflash? Seems like I have read that somewhere (maybe an Urban Tale) that if you disconnect the battery for a while, before you remove the silencer, reconnect and start up the bike, it will compensate for the change.

Sorry if this is a dumb question!

[old as dirt 2]

Maybe the Subject Line could be different, but my question is whether the ECU in a Norge will compensate to a minor change in the silencer. For instance, will taking the DB Killer out of my Mistral cause an issue without a reflash? Seems like I have read that somewhere (maybe an Urban Tale) that if you disconnect the battery for a while, before you remove the silencer, reconnect and start up the bike, it will compensate for the change.

Sorry if this is a dumb question!

I just installed my mistral and didn't do a thing. runs great. did you replace the cat box with a new crossover pipe as well?
I elected to remove the db killer for better sound.

[beetle]

Unless you are running an open-loop map, the ECU will trim the fuel when the exhaust is changed in a way that the AFR may be affected. The trims (or auto learning parameters) are volatile. That is, you can reset them with software like GuzziDiag, or by pulling the main fuses if disconnecting the battery for 60 seconds. The ECU then runs the base map, but starts to trim again. You should reset them after a change. It speeds up the process.

[Jerryd]

Unless you are running an open-loop map, the ECU will trim the fuel when the exhaust is changed in a way that the AFR may be affected. The trims (or auto learning parameters) are volatile. That is, you can reset them with software like GuzziDiag, or by pulling the main fuses if disconnecting the battery for 60 seconds. The ECU then runs the base map, but starts to trim again. You should reset them after a change. It speeds up the process.

So, if I understand correctly. After removing the dB killer from the Mistral, just disconnect the battery for a couple of minutes, reconnect, and it will re-trim? Will it auto learn without powering down?

[pete roper]

If you don't disconnect the battery or pull the main fuse it will re trim but it will take a lot longer.

[Cam3512]

Why take out the DB killer?  Even with it, it's gotta sound better than stock.

[Jerryd]

If you don't disconnect the battery or pull the main fuse it will re trim but it will take a lot longer.

Thanks Pete!

[atavar]

If you don't disconnect the battery or pull the main fuse it will re trim but it will take a lot longer.

Pete, you will know better than I, but do you need to touch the disconnected cables (NOT THE BATTERY TERMINALS) together to discharge the ECU capacitors so it loses it's memory?  IIRC if you don't have to reset the clock the ECU did not reset. 

[pete roper]

No.