evo 8 infamously bad idle.
My friend had a similar issue when he bought his evo. It would die sometimes up hills or going to a stop. Turns out someone screwed the biss all the way in and broke it. Once we change it out, it fixed the issue. Its worth a look. Be extremely careful, its made of very weak plastic.
Im gonna say this AGAIN! Are you on speed density or maf ? If you already replaced the IAC and its still doing that, its most likely to be the bov that you have vta. Then again if you still have the maf with a leaky bov.


