Please help me with this!!!

[mcdonalds737]

I have a 1994 Dodge Intrepid 3.5 V6 engine and when I go to stop at a stop light or sign the RPMs drop from 900 to 500 and sounds like the engine is going to die. What would be causing this? Any help is thankfully taken. PLEASE HELP ME WITH THIS.

Okay now I have a new part of this problem. I took the car for a long drive and when the engine was at operating temp. and I stopped the engine died. What would cause all of this ... low RPM at stop before operating temp. and then dieing at stop when operating temp. has been reached. I disconnected the fuel pressure regulator and it ran fine until the temp. got to operating temp. and then RPMs would drop to 500 again when I stopped. I am so cunfussed with this car. PLEASE HELP ME WITH THIS!!!