hey guys - i was just wondering about this.  when i bought my car it had the giac-x stage-2 tune.  i downloaded the giac utility to change the tune and found out that i only have the stock pump-gas option.  that means that with their tool i can not switch back to the stock tune.

i'm about to swap in k04's and really want to run stock fueling / timing / boost until the car is broken in properly.  i'll either tune it myself or go with a well known epl/vast/whatever tune after its all straightened out.

is it easy to overwrite the giac-x stage-2 tune i have with the stock a-box tune posted by skele4door?  ( i think that was his name...)


thanks guys,
-db

thanks...  i'll spend some time figuring out how to connect... just got my cheapo dummy alpha-bid KKL cable today...

Please try to read the flash before you overwrite it. Having a backup is always good if you can get it off the ECU. 

i agree, if you do pull the original code if you could please post it to the forums for refrence purposes that would be great!

That's what I did in a friend's GIAC-X chipped 2003 Jetta 1.8T. I used Optican (which isn't the best tool except for some ME7) and read failed. He got a permanent "ECU Programming Error" fault that would not clear.

I read another GIAC'ed 1.8T using MPPS boot mode and wrote it. No error. I'm afraid to read chipped ECUs via OBD2.

It's somewhere in my "garbage tunes" folder. Can't find it at the moment.

I tried reading yet another 1.8T that was Revo chipped. I used KESSv2, which is one of the best tools out there. The car went into permanent limp mode just from the read attempt. I installed a stock tune and the ECU wouldn't respond, so the eeprom was hacked by Revo too.

I had to buy a spare virgin ECU and tune from scratch. Runs better now.

I will never try to read a chipped 1.8T via OBD2 again. It's safer to pull the ECU and check it with bootmode.