I remember reading a very old thread where grumpy was was teaching how to tune, I believe it was before this forum was strated. The XDF's available at that time if I remember correctly you had to do math and compute what the bias was. Been a long time since I read it, but I believe it is all handled by the XDF. My only attempt at altering them produced terrible results and I had to go back to a bin before I altered them, I may have had to start over with a download of a stock bin I don't remember. But then I remembered that ancient thread and felt foolish for messing with it. Lol.
Yes pe adds spark, I believe it is under PE spark, has a single column table with rpm as the axis.
If you want to run the open loop bin, all you should have to do is copy your VE and paste it in the open loop bin, same for idle ve. It should run the same as the closed loop bin I supplied you. Then I recommend you just follow the instructions in the how to tune open loop document I created. I spent a lot of time making Sure it wasn't a huge read and easy to follow. I also made a video demonstration of how to use it.
The video is a little long as it's meant to help people who also struggle with computers. But it is here.
thiS is the method I suggest using to finish tuning.
Also for the knock, I suggest you reduce the whole table 2 deg until you are done with ve . If you continue taking timing out and still have the same kr and counts, it could be false. Give the engine bay a good look over for loose rattling heat shields and so on, also do you have a old barrel style starter, or a gear reduction? The old one can rattle around and mess with the knock sensor or so I've been told
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