Heading out for a weekend camping trip and truck decides it has other plans for us. 6.4 deleted, mini max tuner running tyrant tunes (in tow mode at the time) running along just fine when all of a sudden truck starts missing, shuddering pretty bad. Almost felt like a blowout on the tire shuddering so bad, looked in passenger mirror and noticed a lot of white smoke coming from the exhaust. Pull over and shut it off, popped the hood and nothing amiss so I start it back up and still no good power. Limped to the next exit in the shoulder lane (about 2 miles) and checked the code on the tuner and had P0266 #2 cylinder contribution/balance code. I'm assuming fuel injector failure while waiting to hear from local mechanics diagnosis. Any ideas what I'm looking at in repair bill if my diagnosis is correct, or any other guesses what could be the issue?