01 P-51G t

do i have to reflash with my tuner everytime the battery is disconnected? do any of the parameters stay ?

hpwrestler220

Im pretty sure that all of the parameters stay... It's alters your ECU, so that isn't going to change when you switch batteries or antyhing like that...

Bullitt5339

No need to reflash, it saves all the important stuff

cliffyk

No...

Disconnecting the battery will clear the KAM (Keep Alive Memory) where the idle air trim, fuel trims, and a few other learned parameters are stored--however they will be quickly relearned, which is actually sort of good...

01 P-51G t

ok, thanks guys
i was just worried my dynotune, shift points, speedo, etc. would be forgotten. it kinda makes sense that the tuner permanently changes the cars computer. thanks again

krazymofo22

Sorry to jack the thread but if my battery has been disconnected for 5 months, will I need to reflash with my tuner?

01 P-51G t

im in the same boat you are. my car has been sitting for 5 months and i dont know when the battery actually died. hopefully someone will answer this for the both of us.

Bullitt5339

No, the same answer still applies. There will be a little relearn with the idle speed and air fuel, but all the tune information will still be there.