Originally Posted by
EagleMark
I had some time to look at the surging idle. It looks to need some flatening out of the area like spark for idle. I made the changes so you can compare the difference with the bin uploaded here to yours. Choose the 6-8 cell area around idle and use wire frame to compare, you'll see where one area was a huge difference. The entire table is also smoothed, it will look quite differant then your origanal but changes are very minimal.
Saw your BLM issue right to left. See if the flatened area helps. I use a laser heat gun on headers and adjust Individual Cylinder Fuel Trim (At Idle). If you look through bins they all have differant settings, why I don't know. But they can be opisite in same motor same body style, differant in others, then can be quite differant once again if adjusting based on EGT of header. Something is rich on that one side?
Also don't like the method you used for idle spark, it can cause KNOCK off idle. Again take a look at Spark Advance Main and Extended table in Wireframe view in bin attached and you can see how much better it will respond. Again although wireframe looks completly differant, if you compare the differences and take into effect surrounding cells it's almost the same.
The Main Spark Advance, Extended spark advance and main VE tables can be copied into your bin if you wish. If not just look to learn.