I have a 2013 fx50s and been chasing misdfire codes sense I got it. Has been at the Infiniti dealer they changed two vvt solenoids but were not throwing codes for them. Then they told me it might be a timing chain issue and couldn't guarantee it would fix the issue. Could someone shed some light onto this or may have had this issue. Also can someone tell me the firing order and where the location is starting from the front to back. Any help would be appreciated.