Yesterday the UPS truck brought me my SCT tuner from JMS chip as I was leaving for the drag strip. I wasn't going to load anything into my car at the strip because I wasn't familiar with the tuner and I didn't want to mess anything up. I get to the strip and there is a guy there that says he knows how to do it and its really easy. So I say ok that would be cool b/c I would like to see my times with my tuner. This kid has a 04 GT. Mine is a 00 GT. Anyways, I was supposed to have two tunes loaded on there for my car from JMS, an 87 octane tune and a 93 octane tune for my mods. This dude goes into change paramaters and says that I should change a few things because it looked like they hadn't changed anything. He does a few little changes nothing major and loads the tune. My question is: Did this dude just erase my tunes from JMS by changing a few of the "parameters"? The tunes were labeled 'safe', 'mid power', and 'max power'. I'm not sure if this is the generic label for all SCTs or what. If he did change the tunes what should i do?

 

I'm not really sure how to check to see if the tunes are still in there. If you're talking about the three titles safe, mid and max then yes those are still showing. I just think this dude has changed them some but I really dont know. I'm a complete newbie at this tuner thing.

 

You let some kid adjust settings in your tunes which you got from JMS? Bad move. To load them, all you do is plug it in to the OBD-II port by your leg on the drivers side, then follow the directions. Its idiot proof.

 

you don't tinker with any of the optional parameters at the track. Plug it back in, return to stock and then re-apply your tune of choice. That'll fix any fug ups kiddie-boy did and leave you with a known config you can take to a dyno to dial in.

BTW... mail order tunes suck. Take it to a dyno and get your AF corrected.

 

Yep, majority of them do suck. Bring it to the dyno.

 

Thanks for the replies. Lesson learned. I returned to stock and reinstalled my "max-power" tune (93 octane). I'll get this slug down to JMS to get the A/F squared away.