The unfixable mystery problem

[Beals]

Originally Posted by GettaRobo

That is a good suggestion, however, that is not the case with this problem. The car will run fine with lots of power up until 4k. After that, the car simply feels like it is not getting more power. If you depress the accelerator to about 3/4, you can rev it to redline. If you put it right to the floor, it will stop revving at 4k.

Sounds like their is some kind of limiter on your electronics end. Have you checked into the fuelcut? I know HKS makes a fuel cut defender (FCD), you could look into this. It might solve your problem.