I have a 2000 Durango cranks but won't start. Changed the fuel pump and battery it still won't start. What else can I do?

How can you check for a bad coil pack

I just don't want to change every coil pack so is there a way to test each pack?

If you can get it started, take it to AutoZONE. They will load-test your Battery and Alternator for free. You might've gotten a bad battery. Alternator might be going bad. At least rule these out. If you can't start it, do you know a roving mechanic who can perform these Load Tests for you? Worth a try. Rule out simple things first before moving on to more complicated diagnosis.