I mean so much to unpack here: First, what software are you using to try to read the ecu? Because whatever it is just outputs garbage. If the cable you have is a ft232rl chipset you can use nefmoto to read your ecu. Kess v2 is a decent clone tool that has been around for a long time now and works decent on these cars. Depending on what version you get mpps works good too. You need to read out the actual calibration from the ecu, modify that using a definition file and your software of choice to make the edits. Tuner pro works ok provided the map pack you use has the correct offsets and the person who made it has a clue on what they are doing. After you modify the calibration, you will need to update the checksums. The ecu has internal checks that verify the validity of the the calibration data and when you edit the calibration you need to update the checksums otherwise you will endup with a non running car and a bricked ecu. Furthermore, before you touch anything calibration related you should get me7logger or vehical up and running and get some baseline logs to compare against the modified file and to verify the car is running proper   

nefmoto will do the job very well, read, check your ecu/software numbers...after only look for a definition or a definition close to yours and adjusted...then read and reread s4wiki..and when you start to understand things and reread carefully. and of course don't flash a file found without knowing what was done to it...good luck