Why os my car all of a sudden ideling high .

What is your question?

I was driving fine until I went and cut it off when I get in and cut it back on it was idling high in the drive gear it was idle on three and a half when I put it in neutral It idel up to 5 and when I put it in park and idel up to 5 on the gauge I recently had my camshaft replaced two months ago along with tuNe up that was done 9months ago with the coils replaced as wellwhat could be wrong with my car?