[Rodya234]

Well, I know that it says "Top speed fuel shutoff" on newer Cadillacs when you reach the max speed, but now that I think about it, it's probably a spark shutoff. The speed limiter is a PROM that's burned into the ECM, any attempt to bypass it may cause a ECM problem, which could prevent the vehicle from running properly. The fast chip solves the problem by simply replacing the chip that contains the speed limiter PROM with one that dose not.