Hey, i have 75 000 miles on my 2016 2.4 L dart. Car started misfiring couple weeks ago and I'm still trying to figure what the issue is. There are no codes showing up. I have already replaced spark plugs, didn't help. I checked coil plugs by unplugging while engine is running, all of them seemed to have an effect on the engine when unplugged. I found out that when i get the fuel system cleaner from gas station and add it to the tank it gets rid of the misfire for the entire tank. As soon as I refill the tank without adding the fuel system cleaner, misfiring begins again. Cant seem to figure out what the problem is. Anyone ever had an issue like this?