I'm getting the bugs worked out on my 8.1. The motor idles fine, and has great throttle response and full throttle while in park or neutral. I can "burp" the throttle around the block but when I lay in it, it cuts out. I can spin the 52's on a slick garage floor until the tires heat up and start to grab and the motor cuts out. So basically when the motor is under a load it cuts out. The company that did my harness and computer was supposed to take the vehicle speed sensor and torque management off the computer. I haven't been able to get them to answer the phone. What do you guys think? Any help appreciated.