Hi any help would be great I'm really lost with the RPM problem, its been two months since I bought the infiniti from a private seller everything seemed good and had recently replaced its clutch. But since yesterday I let go of the clutch on accident when parking and I noticed the rpm was high when on netural it started off at 1000 then dropped slowly but stopped at 800 so then I decided to test if it would work on higher gears. I started on 1st and I let go of clutch and it would go as if I was giving it gas without me giving gas... same thing happened on the rest of the gears please help!!!

Is the AC on?

Yes the AC was on at first and then I turned it off and tried again and it still stayed at 800?

I know for sure on my 5AT whenever the AC is on it likes to idle at 800RPM rather than the standard 650(+/-50). Not sure if the same applies for MT's, probably does.