My mother's 2002 Caravan is having problems with a rough idle. It currently has 182K miles on it. The plugs and wires are have less 100K on them (I don't remember when they were done but I think they have 60K on them tops). My dad has already sprayed and cleaned off the air intake valve. It seems to do this more when it is having a cold start (not cold outside, just hasn't run for an hour or two) and it does this when it is still in park. It feels like it wants to stall and according to my mother it has stalled a couple times. Although it fires right back, this does need to be fixed. There have been no check engine codes set off. Any advice would be appreciated.