Quote Originally Posted by gpr View Post
Another question is what is a good timing value for idle? it seems in gear it is always going to 18 degrees, which is the value of the High Octane Spark table, but the base spark in gear table i have set to 28 (which is stock values).
There's your main problem. Your spark is locking at 18 degrees and you're not getting any idle spark corrections... so it's entirely up to your idle air corrections to try to keep your idle stable, that's if your idle air corrections are even kicking in (which I can't tell from your screenshot).

I can't look at your tune file right now but maybe someone else can have a look and try to figure out why you're not transitioning to idle properly.