clutch reving up rpms???

[90 yj]

My jeep is doing something very unusual. it does it sometimes an other times it doesnt. Everytime i press in my clutch at a stoplight or to switch gears it jumps up the rpms. For example, i'll start downshifting for the upcoming stoplight, once i reach the stoplight i hold in the clutch. while im holding in the clutch the rpms stay at about 1500 until i start letting off the clutch to go again. It did it a while back then stopped for a good bit now its back. Ive tried giving it gas while the rpms are up but it just goes back to around 1500 or so. Also after a while of holding the clutch the rpms will start going down with time. after a minute or so the rpms will go down to 1000, etc.. What the hell is going on???? ive heard it could be my clutch slipping an several other things.

 

[Rich]

If you've described it correctly, and assuming if you put the trans in neutral and let off the pedal and it does the same thing, it's not your clutch... idle air control.

 

[upnover]

or maybe a sticky accelerator cable ?

 

[paradisePWoffrd]

i second what Rich said... thats most likely the problem

 

[90 yj]

how much to get it fixed, what all is needed for it to be fixed? could i fix it myself or be better to have a shop do it?

 

[camoyj]

a vacum leak will also do this some times

 

[J.C.]

x2 on the vacum leak