[jtdpow]

Hi, last week a friend came with a skoda yeti 1.4tsi bosch med 17.5.25, read the id and download a original file from alientech database, try to write original file and all its ok, car start perfectly and run fine, then modified the file, write and car dont start, all with kss v2 5.028,write the original file again and car start, seems a checksum issue, correct the cheksum with winols, and write again, and car dont start, any reason why car start if i write ori file but dont if i write modified file