New to Custom OS's

[QWKWS6]

So when I convert to EFI, I'll be looking at adding one of the custom OS's offered. If I undertand this correctly, you have to completely overright the PCM? When you do this is there anything that needs to be done to the car when doing a complete re-flash?

[MN C5]

So when I convert to EFI, I'll be looking at adding one of the custom OS's offered. If I undertand this correctly, you have to completely overright the PCM? When you do this is there anything that needs to be done to the car when doing a complete re-flash?

It's super simple,

1st you do FLASH (Program PCM Operating System and calibrations) This takes 3 minutes or so...

2nd you need to FLASH (Program PCM calibrations)

3rd Read the PCM calibrations

4th Tweak it according to the custom OS tutorial

5th Reflash just (PCM calibrations) and your good to go

As far as doing something to the car? If you want a Valet yes... Otherwise I just make sure the Radio and Heat/AC system and Fan are off before I flash the PCM

[QWKWS6]

I didn't know if you had to do a case relearn? or not. I've just done basic tweaks, A/F, Spark, VE, Rev-limiters, etc. The basics. So while I look forward to adding a custom OS, I worry too. Thanks for the info.

[Tordne]

Case relearn data is preserved. There s nothing to worry about going to custom OS, I've done it more times than I'll admit to

[BowlingSS]

You can always go back to the GM OS by reflashing your old OS. Just make sure you save your old tune.

Bill

[FstBlkZ28]

rather than starting a new thread on this. can someone clarify:

Do you need EFILive professional to upgrade a PCM's OS to the custom OS, or can personal do it as well? This would be on an '01 PCM.

[Tordne]

rather than starting a new thread on this. can someone clarify:

Do you need EFILive professional to upgrade a PCM's OS to the custom OS, or can personal do it as well? This would be on an '01 PCM.

To perform a full reflash, which is required to change the operating system portion of the PCM you require EFILive FlashScan Commercial or Workshop. Personal version can only flash the calibration data section of the PCM.

Cheers,

[FstBlkZ28]

Alright thanks, thats what I thought but just wanted to make sure I wasn't missing out on anything lol.

[Tordne]

Alright thanks, thats what I thought but just wanted to make sure I wasn't missing out on anything lol.

Us EFILivers never miss out on much

[FstBlkZ28]

Us EFILivers never miss out on much

True, I'm just dying to get my wideband installed so I can start playing with more things