VTECJUN

I have checked everything possible that I can think of. The car is a 1990 Honda CRX DX with DPFI. I have installed a 95 D16Z6 engine and I also used the Boomslang DPFI conversion harness. The problem is that when I start the car it idles perfect with no codes. When I try to rev the engine it gets to around 3000RPM and then bogs down. It wont rev past that RPM. I have checked the TPS Voltage and the MAP voltage and it is fine. I have changed the MAP sensor, Ignition Coil, Cap and rotor, and the ECU as well. I am at a loss and I hope some one else might have some ideas that I might try. Thanks