Hey guys. I’ve been having some issues with my vaccum gauge lately. Not sure if any of this is normal or not but recently whenever i’m driving and then come to a stop at a light or something my vaccum pressure seems to dip down to 15-16inHg and then quickly rise back up to 17. Also i’ve noticed that if i’m sitting in park my gauge will surge every few minutes. it’ll be sitting at 20 which is where it should be i believe and then very quickly drop down to 16 17ish then right back up to 20. Am i freaking out for no reason or is any of this normal?