Im new to this forum, just got a teg not long ago, it has a B20 engine in it, but when i start the car, and after like 30 seconds it idles from 1000-2,200 rpms. I tried cleaning the IACV, but didnt seem to do too much. Ive been searching and reading for hours about this problem that other people have had and ive heard a lot of things. So, my question is what works!? Thanks

 

try replacing the iacv with a known good one. also check for vacuum leaks. and your throttle body gasket