AQWIKZ

where can I get a stock tune for a 2007 Z06? will need to re-flash every two years. only mod is a C.A.R.B. approved MSD intake manifold. I have not found any information yet. I am already done for the next two years. I got smogged before
the new law. I currently do not have any software to load a stock tune yet. what software will I need?

thank you for the information

madmatt9471

You will not be able to load the stock tune yourself - either with HP Tuners or any other device unless you have access to the GM equipment that can download the GM CALID into the ECU

I am in the same boat as you and you will have to have your dealership flash the stock tune per your VIN into the Vette, and if you download it later with HP Tuners and try to save it and upload it later it will the have the ID of HP Tuners on it and fail

I have my "BONE STOCK 2009 C6 LS3 A6 2.56 Rear Tune" in HP Tuners and even should I download it int ECU it will have the HP Tuner signature and fail, it will have lost the GM CALID (GM Calibration ID)

It's a bunch of crap but it is what it is and right now I did the same thing you did and got it smogged before and am good for two years, however, I have toke it back to STOCK, Cam, Torque converter, stock rear etc. - check out what we have going on in the SoCal section:

https://www.corvetteforum.com/forums...th-2021-a.html

Thanks,Matt

madmatt9471

I have spoke to my friend who works at the GM group up here where I live and it will cost me $425.00 from GM for the stock calibration

Thanks,Matt

AQWIKZ

I'm seriously thinking about getting another ECU with my vin and swap it out every two years. seems like the way to go around this for a while, lol.

thanks,
Mike

rockymountain1999

I just got my ZO6 past the Smog police here in Colorado this afternoon. Colorado adopted California’s emission standards this year. I failed a few weeks ago after purchasing the car in Georgia. The previous owner had a custom tune installed when the heads were swapped. Anyway, I had a Corvette shop reflash the PCM with the GM stock tune with HPTuner. The previous tune also turned off a couple of O2 sensors. They charged me $350.00. I didn’t have to deal with a crank, key fob, security, ect relearn procedures.

madmatt9471

That's pretty cool -

I've heard so far that here is California that we will fail if the HP Tuners thumb print is on the file, I have my stock tune in my Lap Top - I might go over to my SMOG Shop and have them do a scan and see if it will pass (even though I am good for two years) after I put everything back to stock and download the stock tune of HP Tuners back in - if not then it will be over to the GM Dealer to have the ECU flashed with the stock tune.

Thanks,Matt

06MonteSS

Yeah.... Beginning last week, they are now checking ECM programming as part of their smog checks out there in Cali.. if the ECM is not a factory stock program, if the CVN checksum numbers don't match up to the factory stock original programming, you fail... Calibration ID numbers, CVN checksum numbers, have to match the original stock factory programming ID's and checksums in order to pass smog check out there now... If anything does not match, you fail...

madmatt9471

Thank you for the extra input -

I understand the Calibration ID information, however, I am not as clear or it has not been made as clear about the CVN Checksum -

Could you explain the CVN Checksum(s)? any extra information will help -

Thanks,Matt

madmatt9471

Here is some good information regarding CVN Checksum(s) that I found that really helped to clear things up - So I might just be able to drop my "Stock Tune" saved on my HP Tuners and download it since all the values will be there -

https://forum.hptuners.com/showthrea...ng-Smog-Checks

https://forum.efilive.com/showthread...e-tuning-world

https://mechanics.stackexchange.com/...ber-cvn-unique

https://forum.efilive.com/showthread...VN-s-Explained

https://forum.efilive.com/showthread...VN-s-Explained

https://forum.efilive.com/showthread...-Flash-Counter

Thanks,Matt

madmatt9471

Quote:
Originally Posted by madmatt9471 View Post
Here is some good information regarding CVN Checksum(s) that I found that really helped to clear things up - So I might just be able to drop my "Stock Tune" saved on my HP Tuners and download it since all the values will be there - The last link speaks about the C6 Corvette E38 PCM (ECU) - very interesting

https://tis2web.service.gm.com/tis2web you can see your operating system here and checksums (CVN)

https://forum.hptuners.com/showthrea...ng-Smog-Checks

https://forum.efilive.com/showthread...e-tuning-world

https://forum.hptuners.com/showthrea...anty-Reflashes

https://mechanics.stackexchange.com/...ber-cvn-unique

https://forum.efilive.com/showthread...VN-s-Explained

https://forum.efilive.com/showthread...VN-s-Explained

https://forum.efilive.com/showthread...-Flash-Counter

Thanks,Matt
Quote:
Originally Posted by madmatt9471 View Post
Okay fella's here is an update -

Everything is back to stock - I had a busy week and I am still going to try and get the Vette over to the SMOG shop to check the CVN Checksum(s) - from HP Tuners that I dropped in the Vette, my "Stock Tune", saved on my laptop with HP Tuners, it is download and it has all the values in there - but for all of our sakes let's hope that it is good to go and this will be an answer to part of the Puzzle

Will we be able to use our Stock saved tunes saved on HP Tuners or not? - Y/N

Thanks,Matt
Okay - so I just finished at the SMOG shop to see if my "Stock Saved Tune in HP Tuners" would pass SMOG - I had the full check done with it just short of it being sent to Sacramento annnnnnnnd.............

All is good, it passes with NO ISSUES, no CVN Checksum numbers missing or HP Tuner thumbprint - I will not have to go to the GM Dealership and have them re-flash the ECU (PCM) with the stock tune. Of course this is "My" stock tune that I saved on HP Tuners in a file and named and even the name file did not affect the results

To understand the CVN Checksum(s) I ran my VIN here: https://tis2web.service.gm.com/tis2webyou can see your operating system here and checksums (CVN) - it's really interesting and starts to make sense of what they are looking for. Once you see it and then understand that as soon as you make a change it changes the CVN number in the said system. (Timing, airmass, transmission, rear gear, etc.)

This is good news for those of us who have our "Stock" file tunes saved, knowing that we can re-download them from HP Tuners or EFI Live or another programmer that might hold your stock tune -

It's also to note that from some of the research that I did I found reference to our E38 ECM's and they do not have "Bit Counters" in them, meaning that some vehicles have counters in them that count every time you access and rewrite the ECU (PCM) - counting, if you will, till you reach the maximum allowed times and then either having to have it rewritten by the dealer or getting a whole new ECU (PCM) - please don't hold me to this as I do not have conclusive evidence about our E38 ECU's, however, it's a bright side again in this saga!

I hope this helps! I know that it helped me, it helped save me an additional $425.00 to have GM re-flash my ECU

Thanks,Matt

Turbo6TA

This guy just purchased a used C6 .. He had no idea the previous owner must have had some tuning done to the car.

It just failed the California smog inspection ... "Modified Software"

https://www.corvetteforum.com/forums...-software.html

Turbo6TA

Matt ... That is great info you just posted.

I am glad I don't live in California ... With my Heartbeat supercharger in my GS, it would not even run with the OEM tune, so having GM re-flash my ECU would not work for me.

I guess I can forget ever selling the car to someone living in Cali.

madmatt9471

Thank you -

I am going to try and reach out to him and help him out and steer him in the right direction -

Yeah stay where you are at for sure -

Thanks,Matt

TXSTICK

It says "does not match an accepted configuration" , so I would think if you have a Heartbeat Supercharger with the Magnuson Tune (not modified) it should pass because of the CARB certification.
Maybe they add that to the accepted configurations?

madmatt9471

A&A and Edelbrock both have CARB EO#'s and they have failed the the SMOG checks and when you read their Executive Order it reads that they are allowed to write the ECU for the Superchargers and yet they have failed because the ECU's are not stock and don't have the stock CVN (Checksum) numbers -

California will have to fix this, they obviously put the cart before the horse, they even said that their software would be able to tell the difference between a "Tire Height" adjustment and not allow a vehicle to fail, well guess what, there are quite a few lifted vehicles that have had to have that adjustment made and they have failed the SMOG check because the CVN number is now different - So much for California's software -

I'm sure they will fix that in time, when, well who knows, but they say you can set up an appointment with a BAR referee and he can go over your vehicle with a fine tooth comb and see if it will pass or you have to make more changes or not OH! and yes you have to pay for that appointment too, and wait to get one as well!

Check out the Yellow Bullet Forums on this crap! it's laughable at what is going on!

Thanks,Matt

BadAV

Best way to solve it is to move out of CaliCommiefornia....

TXSTICK

With all the overflow of people moving from CA to AZ I hope they don't bring this with them.

madmatt9471

I hope not too - and I mean that.

Thanks,Matt

Turbo6TA

I purchased my Heartbeat SC as a "Tuner" kit. It did not come with any Magnuson tune. After I installed the SC, I had to have the car dyno tuned ... Later, I installed bigger injectors, so I had to have that tune tweeked. Additionally, the car has headers on it too along with the rear O2 sensors turned off via the tune.

I would be screwed with this car if I lived in the "Democratic Peoples Republic of Kalifornia" (DPRK).

I am glad Florida has no smog inspections of any kind . .


Attachment 48336617

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schpenxel

Stock 2007 Z06 file attached