i have replaced the o2 ,ambiant,plugs,wires,map,fuel pump,injectors,coil pack and the van doesnt have an egr valve.I have also had the converter checked and it is ok. Can someone help me please

 

I have a PDF file that may help you, But you will need a scanner to ck. If you want the file just send a pm.

 

I have the same issue with my 2003 Caravan 3.3 flex fuel. Have tried the injectors, o2 sensors, fuel pressure regulator, mass air flow sensor, no vacuum leaks detected. Still have the code P0172.
Was the problem found on the 2002 Caravan? If not, any ideas?
Thanks