Recently replaced my IAC (Idle Air Control) Valve; however, whenever I start my vehicle (when engine is warm) it revs up to about 1200RPMs, gradually decreases to about 500RPMs, and then slowly creeps up to 750PRMs after about a few seconds. Am still concerned about the idle dropping so low initially before slowly creeping back up about 250RPMs. Does anyone else experience this, or do I need to look into this further? The idle isn't bad at all, I am just concerned with how it initially drops to 500RPMs.

 

dont worry about it.