Ok, my last post was about me installing a Flowmaster muffler on my 570. Some of you suggested that I install a fuel controller because of that & I would normally agree to that too, but I just had the ECU Reflashed to the 3.4 version like I read about on the Forum. So my question is, do I still need the fuel controller or will the reflash be fine, because from what I understand the lean idle mixture I what was causing the backfire to start with. I haven’t rode it on a (long) ride yet, I’ve only rode it down my road & so far there’s no backfire. So I will I know if I next the fuel controller? Thanks
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