I'll start with this; 2017 Mustang V6 coupe, Procharger with 3.7 pulley. Running on the same custom tune for roughly a year or so.

I was looking to get some tune revisions recently, so i datalogged the car and sent it to the tuner. He initially thought I had too much sparkplug gap, so I dropped the gap to his recommended 028. The car basically almost didn't run. Put the gap back to 030. Next logs, the VVT were stuck at +12 intake and +9 exhaust, which seems like they were locked out in (I...

P0016, Cam phasers, timing chain etc.