got my sct tuner and jlt II cold air intake for my 06 gt in 2006 with 87, 93 and 100 something tune. my ? is can the tuner lose it's tune? about every 6 months I retune the 93 octane tune about every 6 months. the last time i did this the car seems to idle rough, rolling between 4 and 8k rpms, I retuned again no difference. this is on the 93 tune, I haven't tried the 87 but dont want to go back to that.
thanks for your input on this!