My engine revs everytime turn on... why?

[KenjiFC]

I recently bought an 87 Rx7. Great condition, only had 98K on the engine and its the original engine. Whenever i turn on the engine first thing everyday the engine revs to 3 Rpm. I think maybe its jus because its a pretty old car but I need to know if theres anything wrong with it causing it to do so. Please Inform me.

[dutch]

can't answer what or why it revs so high on start up, but can tell you i have an '88 with 87k miles and it does the same thing. after it idles back down, which only takes a few seconds, everything works as it should, so i haven't been that concerned about it.
Dutch

[sidewaysFC]

all rx7s do this as far as i know its called the accelerated worm up system it helps the engine worm up faster and helps it build oil pressure when u start it cold.

[LunchboxCritter]

+1 AWS totally normal.

[BoostedFC]

Yes Nothing to be worried about.

[Dozer]

3-4.5 is normal rev warming. 5.5 mean you have a broken apex. Not to worry though. It is very simple.