Changing from COS3 to OEM OS question............

[FreddyG]

Hi Guys!

If I'm running COS3 in my car using a 2 BAR SD tune in it, what do I have to do to go back to a standard GM OS?

Do I rescale the 2 BAR MAP sensor or put the stock 1 BAR back in? Does it have to be reflashed by the dealership?

Any help would be Greatly Appreciated!

Thanks in advance! :cheers:

[5.7ute]

Are you removing your FI?
If yes it is better to refit the 1 bar sensor & do a full reflash of your original OS & tune file back to the PCM.

[FreddyG]

Are you removing your FI?
If yes it is better to refit the 1 bar sensor & do a full reflash of your original OS & tune file back to the PCM.

Hi Mick! :wave:

I'm thinking about it. I'm just not sure what route that I want to take right now! I'm kicking around putting the car back to stock, selling the mods, and then the car as an 11,600 mile C5 and getting a new Cadillac CTS-V.....or taking the blower off and going twin turbo!

So I can just reflash the stock tune back in and not have the dealership do anything? I'd do it just like when I reflashed the COS3?

Thank You for the help! :cheers: