Well as I read up on why my jeep would idle low. I was told to change the CPS sensor. So I changed that and worked great for about an hour then wouldn't even hardly start and idles even worse now. What else could it be? Any other sensor? I thought maybe the idle sensor but not sure...And now as I drive down the road the rpms drop about 500 under what I'm running at the surges right back to where it started?? Ehh..