whatever you think
go to fix idle with a multimeter and some general instructions that correlates nothing with the fact that the idle dips and jerks because of PI going over the minimum activation limit and because you seems to trust Subaru so much, you should know that the 2 injections are not scaled to each other, because yes stock tune sucks
AC just can exacerbate the irregular idle but it surely happens also without AC
Whatever, stay in your ignorance, i couldn t care much, I still tune around 6-7 guys every month and nobody complained and guess what.. all with rock solid idle without even checking your lovely throttle plate