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Title: overwriting a giac-x stage-2 tune Post by: s5fourdoor on December 06, 2010, 12:38:13 AM 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 Title: Re: overwriting a giac-x stage-2 tune Post by: turboskipper on December 06, 2010, 08:50:05 AM I think this should be pretty easy as long as you can connect with the ECU using the nefmoto software and supported hardware tool(s).
Title: Re: overwriting a giac-x stage-2 tune Post by: s5fourdoor on December 07, 2010, 12:56:18 AM thanks... i'll spend some time figuring out how to connect... just got my cheapo dummy alpha-bid KKL cable today...
Title: Re: overwriting a giac-x stage-2 tune Post by: Jason on December 07, 2010, 08:38:16 AM Yes, you should be able to overwrite the GIAC tune with the stock a-box using the NefMoto tool with the KKL cable.
Title: Re: overwriting a giac-x stage-2 tune Post by: Tony@NefMoto on December 07, 2010, 10:39:26 PM Please try to read the flash before you overwrite it. Having a backup is always good if you can get it off the ECU. :D
Title: Re: overwriting a giac-x stage-2 tune Post by: carlossus on December 08, 2010, 04:47:42 AM I would suggest that creating a backup of your ECU is essential before attempting any writing operations! :D
Title: Re: overwriting a giac-x stage-2 tune Post by: hihptsi on December 08, 2010, 09:10:10 AM 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!
Title: Re: overwriting a giac-x stage-2 tune Post by: s5fourdoor on December 16, 2010, 08:48:08 AM i spoke too soon...
it looks like somebody just posted this: http://www.nefariousmotorsports.com/forum/index.php?topic=312.0title= Title: Re: overwriting a giac-x stage-2 tune Post by: smack on January 09, 2011, 07:02:39 PM Please try to read the flash before you overwrite it. Having a backup is always good if you can get it off the ECU. :D 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. Title: Re: overwriting a giac-x stage-2 tune Post by: A4Nick on January 17, 2011, 03:57:29 AM Do you have the bin file from the giac 1.8t?
Title: Re: overwriting a giac-x stage-2 tune Post by: smack on July 14, 2012, 08:28:42 AM Do you have the bin file from the giac 1.8t? 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. |