Can anyone get my a stock tune from a VIN

[minytrker]

I re-tuned a 2002 TA that someone else really hacked up. So I did what I normally do and go to my tune library and get a known 100% stock tune with the same OS and options. Well the car runs 100x better but it does some weird things. First the O2's (brand new ones) read weird sometimes, the milivolts will drop to zero at random but the car still runs and drives fine. The second is the traction control cuts on at random, sometimes I'll flash the pcm and the traction control wont work at all, then I can reflash it and it will work. The customer said it never done this before with his bad tune, it just drove and ran bad. The old tune did however have alot of code just turned off, like the O2's. So I want to start with the correct base tune and see if that fixes it. Can anyone get me the stock tune from the VIN?

Thanks

[Steve Bryant]

I document the process that I used here http://forum.efilive.com/showpost.php?p=115151&postcount=1.

Give it a try.

Steve

[minytrker]

Sorry, I wasnt clear. I need someone who can email me the stock tune off a VIN number.

[ScarabEpic22]

Lorenz, Ive heard that the Fbody 12216125 OS is the best to use regardless of whatever stock OS it had. Its the latest Fbody OS, and makes the COS upgrade easy (although I think you know this already).

Any reason to not use the 12216125 OS? Can be had from holdencrazy.

[Steve Bryant]

Lorenz,
I agree with Erik, in that OS 12216125 is likely one of the best, most refined operating systems you can run on a 512 kB PCM. I've run three different stock OS plus COS 3 in my truck and I like 12216125 the best. I think that they significantly improved the diagnostics and the way it manages the engine.

Now, back to what you were saying about getting the tune based on a VIN. The best thing that I know to do is to enter the VIN on the GM site and then search the Holden Crazy stock tunes to look for the same OS for your vehicle or as close as you can get. You could take the PCM to a GM dealer and get them to reflash the PCM with a TECH 2 programmer. I don't know what they would charge, but that is an option.

Steve

[minytrker]

I know you can flash any OS into the pcm. I use the 12216125 most of the time myself. I also have all the OS stock tunes, but this car is acting really weird so I trying to get the exact calibration it came with just to rule that out. There are a few people on here who have access to VIN based data bases that enable them to get the tune like GM does. I was just looking for someone to do that for me.

[Steve Bryant]

Yes, you're right. Some folks do have a TECH 2 and a subscription.

Steve

[ScarabEpic22]

Ah I see your point Lorenz, trying to take all the variables out of the situation is a good idea. Try 12216125 and see what happens, if it still acts weird then use the original OS. Otherwise finish tuning it and off you go!

Wish I had access to a Tech II...too expensive for my blood.

[joecar]

Ok, if you guys are talking about the 2002 F-body OS, then you meant to say 12212156...

You can download this from www.holdencrazy.com under the Stock Tunes page (look for 2002 Camaro, Manual or Automatic).

:cheers:

[Steve Bryant]

You're right Joe on the OS. I was misquoting the number as were others. I did a sort by OS (which you can do on the webpage just by clicking the column header and here's what I got. There are some good candidate tunes right there. Thanks again Joe,

Steve

[1998ws6]

you need to make sure all 8 segments match. For instance the corvette and f-cars have different segments for almost everything but the OS.

Ryan

[ScarabEpic22]

Joe, you are absolutely correct.
Steve, you messed me up because I just copy/pasted the OS num in your thread!!:doh2:

The first part of the OS looked right, didnt pay attention to the last few digits. Whoops.

So it makes a big difference running a Fbody 12212156 OS vs a Vette 12212156 OS? How about the trucks, is there a "truck" 12212156 OS or many flavors of it too? Id like to know for future reference!:hihi:

[joecar]

I think they're the same as long as the other segments match your vehicle as 1998ws6/Ryan said...

except for ETC... I'm not sure about this.

[ScarabEpic22]

Well ETC is only for 03+ LS1 PCMs anyway right? So wouldnt have any effect on the 512kb PCMs?

[joecar]

I just checked the service manual, 2002 Corvette has DBW.

[Cougar281]

What PCM is it (besides 99+ LS1)? I have an 0411 PCM, Tech2 and TIS 2000 and could flash the tune to it an read it out with EFILive provided the 0411 is compatable.

[ScarabEpic22]

I just checked the service manual, 2002 Corvette has DBW.

Interesting, does it use a 1MB PCM? (Is it like everything else, the Vette gets it first?)

[joecar]

I downloaded that file and it is 474KB so it must be a 512KB PCM...

That is GM's model, Corvette gets it first.

[ScarabEpic22]

I downloaded that file and it is 474KB so it must be a 512KB PCM...

That is GM's model, Corvette gets it first.

Good to know, and the 4.2L I6 got DBW in 02 as well...first truck to get it!:rockon:

[1998ws6]

Corvette got drive by wire in 1997 using the 98 pcm, and continues to use drive by wire since then.

The 8 segments tell the other data values, OS, Engine Operation, Engine Diagnostics, Transmission, Transmission Diagnostics, Fuel System, System and Speedometer

For instance a stock 2002 automatic f-body may have:

12212156, 9358576, 9358901, 9358310, 16264429, 16264619, 9373540, 9362080

Where a manual could be:

12212156, 9358578, 9358904, 9358250, 16264430, 16264619, 9373542, 9362082

The 12200411 pcm can be used for any 1999-2002 camaro/firebird V8, but is correct service replacement for 2001-2002 cars.

[ScarabEpic22]

Had no idea Vettes got DBW in '97...

Thought thats what different segments were for, to signify a change in params (trans, 4WD/2WD, etc).

[1998ws6]

GM uses the segments to keep from having to have thousands and thousands of calibrations when sections are the same, as you will notice in the numbers listed the fuel system for both automatic and manual 2002 f-cars are the same. But if you had say a 2.73 automatic car vs a 3.23 car, the speedometer and transmission and possibly transmission diagnostic sections would be different from each other.