I took my 2019 xrs max on its maiden voyage this last weekend, all stock. It ran great for 60 miles before throwing a p0302 at 6500rpm, every time. I was running in the sand. I pulled the plugs to check for too much antisieze and cleaned off the lower portion of the threads, no change. I understand that it could be a burned belt causing my issue even though I did break it in. My question is; will the engine backfire and bog as the belt slips? I get backfiring and bogging at 6500rpm like a rev limiter then the check engine light and limp mode. I just want to verify that a burned belt can act up this way before tearing into it. Thank you for any answers in advance.