2 Step makes my car freak out
So i installed the 2 step in my car with the sct x3. i set it to 3500rpm, go to test it out. it works but once i shift, the car freaks out. brings the revs down to 4000rpm jerks like crazy. then once the speed of the car gets to 4k rpm it lets me go past but is still jerky. tried a couple more times but took it off.
Any one know what i have to do to use this. Would help durring drag racing this summer.