Originally Posted by litz4244
I don't know if the v4 is the same as the v5. But I had the same problem when I updated to new firmware and maps after installing my Rbs. I totally forgot all the resets that I had to do that was in the read me file. My car through missfires on all cylinders. So reloaded firmware did all the resets and reloaded map and car ran good. Again not saying this is the problem because I don't know how v4 is but just throwing out an idea.
+1 same thing when I went from v4 to v5. Make sure to do all the resets.