Check the fuel pressure before jumping in a replacing the least likely suspect. The most common problem with Chrysler fuel pumps is they fail to start running resulting in a no-start condition. Unlike GM pumps, Chrysler pumps rarely quit while running and don't cause many other problems.
You will never solve a running problem on a Chrysler product, other than a diesel truck, by replacing the fuel filter. It's more likely, but not often, that the pickup screen in the tank becomes plugged. The symptom will be stalling when the largest volume of fuel is being pumped, ... Which is during coasting. It will run fine at highway speeds and even better under moderate acceleration.
The best place to start is by connecting a scanner that can read live sensor data. If the Check Engine light has come on, there will be at least one diagnostic fault code stored in the Engine Computer. That code will lead to the circuit or system with the problem, not necessarily the defective part.
Also look at the MAP sensor's readings. It's values must remain between 0.5 and 4.5 volts. He has the biggest say in how much fuel enters the engine. The values it reports can be wrong but as long as they stay within the acceptable range, no fault code will be stored.
Another somewhat common problem is a cracked flex plate. It cracks a circle around the six bolts that hold it to the crankshaft. When it turns slightly, there may be no other symptoms than rotten engine performance. Related to that, a cracked core in the crankshaft position sensor can cause the symptoms you described but it's more common for it cause backfiring intermittently.
Sunday, December 5th, 2010 AT 7:38 PM