Tachometer twitches at idle?

ghost

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When I am at idle my RPM's are about 700-750. However just recently I have noticed that the needle twitches ever so slightly when i'm stopped; it's barely noticeable, but it does. It twitches up about 20ish rpm's I guess, then goes back down. Is this a problem?

Also, I swear my RPM's at idle used to be about 1000. When I start my car it goes to 1000-1100, but once I start driving for a little while it drops to the 700-750 range.

I drive a '03 Hyundai Accent manual.

All help appreciated!
 
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