Ok, here is the deal. I put a 94 GSR engine into my 94 EX about 2 years ago and I have always had a check engine light. Just recently I turboed the engine and shot the DTC code and pulled a code 23 for the knock sensor. With the turbo on now that code became a big problem cause it puts me in limp mode. The question I have is does anyone know if the GSR harness and ECU are pinned different than the EX? I used the GSR engine bay harness and pluged it in to my firewall harness but on the passanger side in have a 2 pin plug coming from the engine harness and doesn't have a plug for it on my firewall harness. The color of the wires on the plug are yellow w/black strip and then a red. I know the knock sensor wire is a red w/ blue, does anyone know if this could be a related problem??? Also this is my first turbo project and I have know idea what the hell I am doing just yet. The car runs good and hard when the check engine light is off, then I get put into limp mode and get detonation from hell and the car suckx. If you ahve any hint, tip, fixes, or help's please hook me up.