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Originally Posted by
SHMUSTANG
i have changed a 2008 roush supercharged mustang from automatic to manual mechanically it is sound but have an issue with the tune. i have changed the pcm and purchased a new engine harness. as the orginal tune was for the auto i soursed a manual tune which i have tried to write to the pcm but evertime i try i get the following message "write transfer request x7 negative response code. can anyone give any advice or herlp please on what this message actually means and what i can do. many thanks in advance
mike