I recently did a swap, putting a jdm b18c1 in my 1993 hatch (DX non-vtec). We finished the swap fast and easy. (we wired new wires from the ecu to the vtec pressure switch and the silonoid). When i drove it the first time and hit vtec, WOW the car flew. I loved it. After i punched the car about 3 times. The Check engine light turnd one. Also the car was now ideling at 2500 rpm. Now when i punched the car the rpm would rise slower and it would take a long time to hit vtec. HELP PLEASE !!!!