Except for diesel trucks you will never solve a running problem on a Chrysler product by replacing the fuel filter.
Are you guessing at the throttle position sensor? That's the most expensive and least effective way to diagnose a problem. They typically cause a hesitation on acceleration but the momentary dropout in its signal will be detected and a fault code will set in the Engine Computer. That will turn on the Check Engine light.
Sputtering and intermittent hard starting but it does start eventually, then run okay suggests a fuel supply problem but that is not the way Chrysler fuel pumps generally fail. A much more effective way to diagnose this kind of problem is to drive it with a scanner connected that can display and record live data. You press the "record" button when the problem occurs, then the scanner records a few seconds of sensor data. Since that data passes through the scanner's memory, the recording actually starts a couple of seconds before you pressed the button. Later the data can be viewed slowly to see if the Engine Computer reacted to a glitch in a sensor's signal, and you can see which sensors reacted to a change in operating conditions. Experienced mechanics can diagnose a lot with that information. The rest of us are just shooting in the dark and guessing. Every time we do that and install another new part, we introduce another new variable that the computer has to learn.
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Wednesday, June 13th, 2012 AT 5:29 AM