I have a 2012 hemi. Less than 100 miles after 100k it started acting up. It will miss at about 4 to 5000 rpms and continue to untill you shut off the ignition and restart. When it starts you get pre ignition ping for a second as it starts. Will run great till it winds up again. Also it won't give me my codes with the check engine light. It just put the -------- like it doesn't have any. Just put new plugs in. Helped the power so I don't have to punch it but it's getting old. Leaning towards an injector. It has a tick but is very high in the motor and possibly external. I just don't understand how a dead mis will come back on a restart if it's mechanical. Thanks!