Hi guys , had this idle issue with my s13 ever since I bought it will idle fine when cold , as soon as it gets to working temp the revs pick up to 1700-2000rpm have tried replacing the aac valve although it was a brown plug type , not sure if there is much difference It would only go up to around 1500 rpm then but the problem still occurred if you remove the aac plug when it’s warm it will idle at around where it should be 700-800rpm And then as soon as you plug it in will rise straight back to 2000 it seems something is telling the aac valve to just stay open ? Should it be pulse width modulated ? Have cleaned it out clinically and made new gaskets so there are no vacuum leaks to the valve can’t find any vacuum leaks Elsewhere would I be best buying another green plug type aac valve or where would be a good place to look any ideas are welcome as I’m tearing my hair out Many thanks
