Increasing ICP and SOI will make the idle louder, I have no idea how much to add as I was always trying to make the idle quieter.
I would not know how to purposely mess up the idle using the PW map. My first guess would be to lower it to a point where the injector will not deliver any fuel (.5ms) in the warm normal idle range, then a cell over jack it way up.
I have never really wanted to purposely mess up my idle so I do not know all the tricks.
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