please help me out 1999 Corvette start and stall

[pjdbm]

Hi all,

I purchased a 1999 corvette a few months ago, it came with a 12 tuner, the car only has a ONLY a CI as a mod, everything else is stock.

I tried the diablo 93 octane and the car would start and stall, I went back and did the 91 octane and same isse.

I tried to restore the stock tune and she still starts and stalls.

I get all sorts of weird messages, low fuel, low engine power, low voltage, the car was running fine yesterday.

any help to get me back up and running

TIA

[AllUSA]

Check and see what codes you might have. Post your last written and original file up. Might be able to help.

[pjdbm]

I see two files in the tuner, what do I use to open that file up so I can paste it here?

Someone mentioned to me that I my bateery might not be fully charges during the upload, I have a battery tender on it right now

[pjdbm]

Hi, this was the last written tune by the previous owner

[06MonteSS]

Anything aftermarket installed in the truck? i.e did not come from the factory?

make sure anything aftermarket is disconnected/pull the fuse for - anything like aftermarket stereo, subs, amps, nav, alarm, remote start, seat heaters, trailer brake/light setup, etc.. anything like that, their wiring harnesses need to be disconnected/pull the fuses for it before you try to tune anything...

also make sure everything is turned off inside the truck.. lights, radio, heat/fan/blower, do not operate power windows, put your parking brake on, etc...

those old vettes are quirky.. after completely installing a tune, disconnect the tool.. then disconnect your negative battery cable from the battery for about 10-20 minutes.. then reconnect it.. and fire it up.. should be good to go.

[pjdbm]

Hi 06MonteSS,
Thanks for replying, there is no mods on this vehicle except for a CAI system. Everything else is stock

I am in the process of installing a new battery, voltage was around 12.2 after the tune load and that might be a little low for the Vette.

I spoke with your tech support today, very nice person.

I am praying all this is is a battery change , will keep you posted

[pjdbm]

Bought a brand new Optima battery and installed it, the car started with the stock back up no problem, only thing I saw was the temp going past 190 which was odd.

I tried loading a 91 octane diablo tune and when finished, it did not start again. I should remove the negative cable every time I load a tune? or should I just go back to the stock tune?

[mikel]

I have seen this randomly on C5 and never been able to replicate it, but yes, disconnecting the battery for a second after flashing is the fix for now.

Thanks

[pjdbm]

Thank you! this worked perfectly!

I love the Diablo 91 octane tune, car is back at 190 temp and runs very strong.

Thanks again for all your help!