[GTP Dad]

It certainly sounds like you have multitude of problems with this van. First, take it to a garage and have them look the van over including a computer diagnostic. They will be able to tell you what is going on with the van and then tell you what you need to fix first. If you don't have the money to fix the little things then get only those things done that affect the drivability of the van. Obviously there is a problem or the service engine light would not be coming on. Second the smell coming from the engine could be from a leaky hose or water pump that will cost less than $200 to fix if it is the water pump. As far as the valve chatter, when did you last change the oil? Dirty oil can cause this problem and it is relatively inexpensive to fix. You are probably due for a tune-up anyway. Wires and plugs at least. Have the PCV valve replaced and the idle air control motor cleaned. Cost about $12 for plugs and $35 for wires, a PCV is a couple of dollars. Labor will cost about $60 depending on the labor rate in your area. After you have had it diagnosed let me know what they find and I can give you some more advice. I hope this helps. PS. If you don't understand what they are telling you about the van ask questions. If they won't give you a good answer, post again and we will try to sort it out for you.