What is the firing order?

Here's the drawing. List the exact fault code number if you need more help.

I see your confusion. There's no arrow indicating the front of the vehicle. I found other drawings, some of which show it as a transverse engine, and others that show it a normal, "north / south" engine. It appears in the previous drawing, the front is on the left side. To add to the confusion, Chrysler always numbered the cylinders on the driver's side with odd numbers, but here they did the opposite. Sorry for making this confusing.

With a normal engine, bank 1 is always on the driver's side. I get confused when it's a transverse engine.

Code 300 is for a random cylinder misfire. That code can even set when you don't feel the misfire. Look for something all the cylinders have in common, such as low fuel pressure, low charging system voltage, blocked air filter, and things like that.

That's what I see in this diagram. As I said, that is the opposite of what Chrysler used since almost forever. Normally 1, 3, 5, and 7 were on the driver's side. This diagram took me by surprise. I looked at others and they all show the same thing.