Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello I will help you with your question,
Yes the spark advance is just what the computer "decides" is needed for proper operation of the engine based on it's inputs to adjust the spark timing
I am not sure you have the term for the other correct though, the cam/crank offset is the difference between where the crank position sensor and the cam position sensor see #1 piston. If the distributor is rotated the cam/crank offset need to be set to less than 2 degrees. Rotating the distributor does nothing to set the timing but will result in a P1345 code if it is moved beyond the 2 degree maximum offset between the cam and crank signals and may result in overfueling of the engine.
Please let me know how I can help you with your question