having a problem with dam idle revs they keep jumping upto 2000 and sitting there for a while then coming down if i rev hard they drop normal back to 700-900 roughly but if im sitting in traffic just on the clutch the revs raise and i roll away getting on my nerves only happens when the engine is warming up its probably timing but it was timed only 2 months ago and after the car been running about 30 miniutes doesnt do it no more only seems to do it when its warming up temps between 60-80 on the mfa.