Not sure if this is normal on these cars but sometimes my idle will jump a little (500-700rpm) its a 6MT nothing done besides an intake. On my other cars I can fix them and more or less know whats wrong but since this car is newer and a stock n/a thought there might be something wrong.

 

bump

 

My 06 idles at a certain speed(around 700) and never moves. Its slightly higher if the AC is on. The needle never bounces at idle.

 

I know this is normal on my other cars but there all FI and have tune maps ect ect and there all manual aswell. My Z is manual and that might be a factor....