Reasons how something can happen...
 

I am wondering how a car can lose a tune... im almost 100% that my Camaro has lost its tune. It sat for like 3 weeks the battery died and after I started it to bring to the autobody shop it seemed to run like garbo and shift points r off... anyone have any ideas?

Sounds like you lost a sensor,not the tune.

like a knock sensor?

like a fucked up maf or tps.

I'm pretty sure you can't just lose a tune no matter how long the car sits or the battery is disconnected. You could lose idle, but not the whole tune.

try bringing it to someone who better understand how to read the sensors, or start replacing the easy one's.

If you're near worcester at all I can put my ethos on it and tell you what the sensors are doing.

ill be up that way soon ill msg u... my army unit is there on lincoln st and I need to pay them a visit

Let me know my work is only like 2 miles away

Why not bring it to the person that does them for a living and knows what to look for from the sensors?

You guy's kill me.