I'm pretty sure that the "base" timing is programmed into the PCM and there is nothing much you can do about it. The PCM adjusts the timing, as needed, based on various sensor inputs and its programming. Timing adjustments different from those produced by the PCM can be made by intercepting the CPS signals, making changes, and then sending them on to the PCM. Also it's possible to intercept the PCM signal going to the coil and then add a delay.
What are you thinking about doing?
2001 WJ Limited with Quadra-Drive, Kenne Bell Supercharger, 3-inch Kolak exhaust, Stillen rotors (F/R) and MM pads, Addco sway bars (F/R).
Last edited by rm2001wj; 08-31-2007 at 02:38 PM..