try resetting the throttle body by leaving the drivers door open then turning the ignition o dont start it just wait ul hear a buzzing noise in the engine bay it can last between a few seconds and a minute or so whren it stops start the car
i dont really care if it makes any power it sounds great and i gained 25 whp and 30 lb ft at the wheels from header 268 cams and remap so id say it does give a bit of power