I was pretty meticulous in making sure that I was timed correctly: TDC/Dampener @ 0/Rotor @ 5/Plug wires correctly cylindered. Checked several times, after I discovered that the timing was retarded by one gear tooth (27ish degrees). I don't have the luxury of pulling the code, at the moment, and honestly, I'm not interested in purchasing a code reader. But I may have to if the CEL is part of a problem that won't allow me to fire it up.