Originally Posted by two trackin fool
Is that something I can do with the injection ?
Or do I need to have the dealer do it with the PCM ?
Yes you can sync the throttle bodies.
But like Sumi said, first make sure there are no leaks of any kind. This is crucial as the sync is pointless when you have airleaks.
Syncing is like putting the cherry on top, the rest of the cake has to be perfect to make it work.