The timing is not adjustable at all. Turning the distributor controls the synchronization of the rotor with the coil and the injectors with the spark. It requires the use of a professional scan tool to observe the "Cam Offset" PID and adjust it to "0".
You will have to get it close first to be able to get it started.
Here are some larger diagrams (below)
Images (Click to make bigger)
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Thursday, March 3rd, 2011 AT 10:27 PM