i’m using block b20b from CRV and b16a head for about a year now. about 2 months ago and the idle is up and down and CEL with code 14 (IACV).I already change twice the IACV and FITV and the result still the same. I also did coolant bleeding and vaccum check, there is no leak.I just try borrow from my friend car that working properly but the result is still the same. Idle up and down and the CEL appear after engine running 5-10 seconds. I think after this i’m gonna try my friend ECU that same with me (P30). Need some advise here….. please