Seen this on here before and other boards as well. Just want to share so we can keep the information flowing. Charger Hellcat delivered on Aug 13. Just went on first long road trip (about 700 miles round trip). Turn 1500 miles about 45 minutes from home and the car started to rumble/shake when I gave it throttle. After stopping to do a walk around and popping the hood to see what I could see (nothing) I got back on road and the check engine light came on. Ran the onboard diagnostics while on the road and got the P0301 code. My copilot (the wife) did some research and figured out what the code was. I limped home (about 35 miles) with check engine light on. Had the rumble most of the time but occasionally it throttled smoothly. Took the Cat in to my Dodge dealer and my service coordinator is giving me the VIP treatment. He slid some other work around to get my Cat into a bay ASAP. Now at home standing by to get the full diagnosis. I was able to get my trade in (2013 Charger SRT) as a loaner. That was pretty cool. Research shows possible bad plugs or possible bad rocker arm. Anyone else have any other info while I wait? Let me know what you all know about this please. I will keep the Hellcat family updated on the goings on.