os3 in 02 zo6 timing problem

[b18cls1]

i am using os3 i a vette with a 2bar, speed density and the car will run fine for about a day then timing get about 20 deg advanced total< crusing at say 30 deg adv then tip in the throttle and timing will drop to say 19. 1 or 2 days later crusing again at 30 then tip in the throttle again and timing will go to 46 deg....???? load the tune in again and then its back to normal.

[Highlander]

Can you please verify that there is no knock retarda and/or adaptative spark kicking in?

[b18cls1]

Yeah, there was no knock retard or adaptive spark.

I think we have the problem solved...I will post up the 'fix' when I know for sure.

[slowhawk]

I had this problem before. It was A0001 and A0002 . It would show out of range even though it was at 100%. You need to change them to 90%,save that file,then redo them to 100% . Close the file and reopen and it won't be out of range anymore.

[GMPX]

Yep, that's the one, I am sure the software used to correct those out of range values at some point when the file was saved.

Cheers,
Ross