my brother and i just swapped a b18a1 into my 89 crx hf. when i turn it on it idles at 3500 rpms until it warms us then it idles at 2000rpms. i hate turning it on when it's cold cause it's so loud until it heats up. wouldn't a vaccuum leak have a constant idle problem and not change after warming up? i could maybe clean my idle control valve but that would cause it to be idling so high would it? please help!!