I just installed my xe230/236, and i have one single cylinder miss-firing. checked the plugs and wires, injectors are all plugged in. Could my opti be causing the single miss? just a cap and rotor should fix that though, right? I'm also still running my stock program until i get my miss fixed. and it runs fine through the rpm band, its pretty consistant to the single cylinder, so its not the optical part of the opti. any thoughts?