It keeps high revving up and down after car is on 2006 hyundia accent

put a diagnostic scanner on that...they are around 15 dollars each from Amazon~ the diagnostic port is within' three feet of the ignition switch~

Did the cleaning and replaced the actuator assy-idle speed problem still going and I'm about to hook it up to the PC now

Tom is right...that condition sounds like a vacuum leak~

RTV black was my staple for sealing (make-A-gasket) material....a few beads of this where it's whistlin' will cure this~

Checked the hoses all is good but I once I disconnect the idel air control problem stops

You know what to do then~

Question: 2009 Accent Hatch GS Manual Trans, revs 4000 rpm at 80 mph on 5th gear. is that normal? It freaks me out that its gonna snap a rod or something. I need to go faster on my commute to work .. anyone notice this also on a manual transmission ? I had the clutch done and it behaves normal at idle below 1000 rpm... does this engine usually rev high? its top limit is 8000 rpm