Your car has a cold start valve (injector). it is located between the front and rear intake mainfold runners (between 3 and 4) as previously mentioned. it is controlled by a vacuum thermo valve and the temp sensor. It's only function is to provide a rich mixture under cold start conditions. A lot of the time the thermo valve will break and lose vacuum. Check all of the connectors, etc, along the driver's side of the head.
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.