jaguar S-type 3.0 v6 2000 does not accelerate

I'm here in my workshop with a jaguar s-type 3.0 v6 year 2000, I'm from Brazil and here I do not find any information of this brand, only in dealerships. My problem here is that it does not accelerate, all the injection modules and commands have been changed because they were broken, it works perfectly only that it does not accelerate, I examined everything again I left a few days the battery turned off to reset more then it worked and accelerated a couple of days, then it did not speed up any more. it is in the slow state, it is defective in the butterfly position sensor, but we do not find here in Brazil an electrical schematic with measurements and parameters for the test of sensors and actuators. Detail that with the key on the butterfly body accelerates normal and when starting does not accelerate. Has anyone picked up this defect or has an electrical schematic to help me? Thanks in advance.