Back info- 2010 cadillac cts 3.6L Supercharged (8-9 psi)
The kit provided a base 'starter' tune. I know it could be timing advance and increasing the richness (knock sensors going off). Gas economy is poor and i want to tinker. Reviewing online about tuning and watching great videos and searching google came up with more questions. lots of videos have you close loop the o2 and fail the maf sensor; no where in my hp tuners is this an option plus speed density is missing. is this the car or do i need to buy something from hp tuner or do i need an aftermarket ecm?