Jon, it was after. The problem was rooted to the failure of the battery. I also remember the tuning shop hooking up a battery charger while doing their work. I do not think Sprinters like to be poked around electrically. Also, the dealer found out that the ASR system was the cause as well. Ever since I got the van, the ASR never did anything when I played with the button. I was told that there was a command string that was never programmed in at factory. The ECU didn't fail electrically, but rather that the command string would not take into its memory. Once the thing was all put back together, they sent it back to DynoComp and never had an issue ever since. Not one light of any color lit up on my dash! It's been a few months so far. All this made sense to me since they were able to run it on the dyno with no issues. I spoke to DynoComp regarding this and they would have disabled the ASR via software to run the dyno portion of the test, however, the van didn't go into ASR mode on its own, so they did their magic. Overall, I am still pleased with the performance. Would I do it again? In a heartbeat. At first, I wasn't sure it was worth the cost but over time, the van is so much more drivable in my neck of the wide and long roaded woods!