2002 ram idling weird

I have 2002 Ram 4.7 Ltr, 105000 miles and at idle it revs high and then normal then high then normal. I have no idea what is the issue. Anyone have any ideas? I do think it might need a tuneup but not sure if that has any idea with the idle issue.

The idle air control valve (IAC) might be sticking and need cleaning with carburetor cleaner.

check the pcv 90 deg hose at the rear of the intake manifold may be split causing and vacuum leak