when coming to a stop light I usually leave the car in gear till the rpms hit about 1000, then I press the clutch in. recently it just got cold here, and when I do this, the rpms dip down to about 500-600, then rise back up to 750. once I am at idle it stays there perfectly. also, when i do not engine brake, and just press the clutch down while i am going 40mph, the rpm decrease to idle perfectly without that initial "bobbing". i have an SRI and am throwing no CEL's. wondering if this is just normal.