The kit NOS 02121NOS requires the RMP's to be between 3000 to 6000, and to be at WOT, which is supposed to produce 4.3 volts from the TPS, for it to activate. I have done all the test and it works fine. I have ensured that the silonoids work as well. But it will not activate on the track. My guess is that the TPS at WOT is not 4.3 volts. I have an aftermarket Trottle body (BBK) could this be my problem. Is it safe to change the default setting im guessing not since i havent yet. Any help would be greatly appriciated.