SCT X-Calibrator 2 Question

yes, it prevents a voltage spike.

theres been so many different views on this issue. the directions say pull#3,41. im lead to believe this is for older cars. my tuner told me there was no need to pull them and ive tuned my car probly 5-6 different times. i did pull the fuses once just to see if the car behaved differently. same result no difference. ive even pulled fuses to see if they were blown, i had no problem. my tuner is brenspeed.com. if you feel safer pull them. some have said they needed to pull as many as 5 different fuses. so just do what your tuner says , but i really dont think you need to. vynle.