HPT = HPTuners which is an interface and program for plugging a laptop computer into our cars and tweaking the settings. It's a little spendy, so if there is somebody in your area who has one (or another interface for talking to the car's ECM), it would save you some money. Otherwise go to www.hptuners.com and check out their system.

From what you're saying, we had the same problem. Doing datalogging with my HPT showed that our numbers are WAY off with a new intake which is throwing the codes.