First of all, other than on diesel trucks, you will never solve a running problem, especially a no-start problem, on a Chrysler product by replacing the fuel filter. The coil pack is three ignition coils in one assembly. You know all three won't fail at the same time. If one were to fail, which isn't common, the engine would still run on the other four cylinders.
The first thing to do is to read the diagnostic fault codes. Chrysler makes that easier for you to do yourself than any other manufacturer. Cycle the ignition switch from "off" to "run" three times within five seconds without cranking the engine. Leave it in "run", then count the flashes of the Check Engine light. There will be one or more representing the first digit of the first code, a short pause, then another series of flashes for the second digit. There will be a longer pause, then the next code will flash the same way. You'll get code 12 because you disconnected the battery. That will have erased all the other codes that might have been set, so that valuable information was lost. If you're lucky, a code will have set again indicating the circuit that needs to be diagnosed. The last code will be 55 which just means it's done displaying codes.
If there are no codes, the next step is to determine if the automatic shutdown (ASD) relay is turning on. You're going to need a test light or voltmeter for this. Test lights actually work better. Back-probe through the rubber seal in the connector for any injector, or either small terminal on the back of the alternator. You will see 12 volts there for one second after turning on the ignition switch. What is important is if that voltage comes back during cranking.
Thursday, January 2nd, 2014 AT 9:37 AM