My car is basically stock, (see mods in sig.) and ever since I put a 3.42 rear end in and used my Crane cams vinci tuner to correct the speedo my car cuts out at 85mph. Thought it was the rev limiter but its not, does it at different rpms. I am using the hi-perf tune with stock cam option. Left everything else alone...oh and did remove the speed limiter in the program, set it to unlimited. Any thoughts???? Thanks!