hey i have a 95 hatch with a b20 vtec rs machine type r pistons skunk 2 manifold with blox 70mm throtle body runing on s300, well when i drive it and get up to about 2800 it starts acting like it has a bad iacv but it aint throwing no code, except when i unpluged it to check it, any suggestions would b nice thanks

 

your idle set screw could possibly have some carbon build up on it. pull it out and clean it with carb and choke cleaner and then take a q tip put car a choke n that and wipe out the inside of the idle set screw threads. just a suggestion

 

thanks tried that. didnt work still doing it,it was pretty clean though, also readjusted my tps just in case even though it was readen rite on my ohm meter. gona still my iacv off my 2000 civic si and put it on it just to see