I tried to flash my 2015 Corvette Stingray with an i3 device just now and it did not go well.

I chose the advanced tune, selected the "diablotune" then modified it slightly to increase throttle boost 10%. I then followed all of the instructions and the flash seemed to progress. However, as it was flashing i noticed the dash started to indicate that the car was in reduced power mode and upon completing the flash and starting the car it ran incredibly rough with the idle jumping all over and sounded awful.

I immediately flashed back to the stock tune and although the car was no longer in limp mode and ran/sounded better, the check ending light did persist.

I used a Diablotune i3 to pull the codes which were both ECM sensor related (p0697 and p06a3) and I tried to clear them, but they were still present. I ended up disconnecting the battery for a minute or two and after reconnecting and starting the car the check engine light was gone.

Very scary.

So I'm left with several questions:
1) Why did my initial flash go so wrong? Did I miss something or do something wrong?
2) Has anyone seen those ECM error codes before? Or know why I was unable to clear them without disconnecting the battery
3) Any other thoughts or advice? I'm reluctant to try again

 

I wouldn't touch a canned tune period. My suggestion would be to return the diablo unit if possible and get tuned by someone whose reputable in your area.

 

I'm sure the OP appreciates your opinion on canned tunes, but thats got nothing to do with the issue he is experiencing.
Seems to be a C7 issue, doesn't matter what you are flashing with...
https://forum.hptuners.com/showthrea...ash-tune-on-c7



I can only find one other example, and it was not with our device either, hopefully OP finds a solution beyond whats been posted in the past.


Thanks

 

Yep that sounds like it's exactly what happened to me. Not too much help that thread sadly .

The only thing I can think of is that I had a VItesse TC hooked up while I did this and perhaps that freaked out the ECU somehow?

 

That shouldn't cause an issue, but it cant hurt to disconnect it and try without it to confirm.

 

Since you seem to have "gotten away" with it this time, I wouldn't being doing so again. Just sayin'...

 

Yes...unplug the Vitesse TC upon uploading tunes. Had same issue. Vitesse works fine after uploading is complete. I had Lewis at Diablew custom tune mine which will dial in car a bit better. Best of luck and enjoy!

 

I have uploaded my Diablo tunes several times on my 2015 and every time I have to remove my battery cable after the tune uploads or I get the same issues as the OP . It’s almost like the ECM never reboots completely unless I unhook the battery .

OP upload the tune , remove the cable for a few minutes and you will be fine

Mike , maybe we can find out what is causing this , when it first happened to me I sent you a PM where I think you stated that sometimes you had this happen on your ATS .....

Dave

 

I remember in my ATS, if you left the Ignition in RUN after the flash then tried to start, nothing would happen.
Had to cycle it back off then press/hold for start.
I'd also get rough idle (PCM moving the cam around after flash) which is not uncommon on the DI/VVT applications right after a flash, but it would clear up in a minute or so at most.

 

My car was in limp mode, not just experiencing a rough idle that I could expect to clear up, but the fact that there are at least a few others who have experienced this is somewhat encouraging. After my first attempt I was really disappointed and extremely reluctant to try it again, but hearing that others have experienced this and still been successful in flashing makes me willing to consider it and I have a few different things I can try now (clearing the battery post flash, disconnecting the TC)

.

 

Hoping for a positive result

 

Thanks Mike !

It was pretty scary for me the first time it happened as it was idling really rough , the check engine light came on and I think it did not even respond to the gas pedal so I can understand why the OP was worried .

I was thinking that maybe the ECM was not completely going to sleep even though I was pressing the start button when instructed by the device to shut off the car and then put it back in the run mode as my dash and other things stay active till I open the door

After I got the message that the tune was successfully uploaded I now shut the car off and I disconnect the negative terminal on the battery, let it sit for 30 seconds , reconnected and then everything is fine on the next start up so I just make that part if my regiment everytime I upload or restore a tune . I know the tune uploaded as I have shut off the AFM and it is in fact off after the upload

I did not even think about disconnecting my Vitesse as I always set it at Zero before I do any upload or saving of a tune .

Next time I will disconnect ithe Vitesse and see what happens and then post back to the group .

Maybe someone on your development team can find another 2015 to 2017 vette and verify that this is what is happening as I thought it was just my car until I stumbled on this post. I even updated my tool just to make sure I had the latest updates

OP , like I said above after you get the message that the tune was uploaded successfully, turn the car off , let it go to sleep , dash lights off , interior lights off etc , then disconnect the negative terminal on the battery for a minute , then reconnect and you should be fine , let us know,

Dave

 

The Diablo is fool proof , if a tune goes bad it will tell you and then automaticly restore the original tune. no harm no foul

Ask me how I know ....( I accidentally turned the car off before the tool told me ... thought I bricked it ... ) on the next press of the key the tool told me the tune upload was unsuccessful and started the restore process all by itself . Disconnected the battery , reconnected it and I was back to having my stock tune loaded .

I am not the only one as a friend if mine did not have the cable firmly seated in the OBD port ... his also did the automatic restore and he just started over

The Diablo is pretty much fool proof , change a setting and things go bad ... just restore the tune and start over ...

Been using one since back in my C6 days , For just a 93 tune , a CAI or a custom Diablo Lew ported manifold , header and CAI tune you cant beat it and I don't have to worry about the tuner going out of business or if I want to take the stuff off the car and return it to stock ....

There are so many settings that you can adjust yourself. you can even do away with the Vitesse if you want to as you can adjust throttle response curve along with many other settings
Mike and Lew's support is 2nd to none , have a problem , send an email and get an almost instant response...

Dave

 

I agree his stuff works 100% on a stock car. Will easy can put the stock tune back into the car..