Originally Posted by SoilSampleDave
Do you have the unrestricted Euro map installed? It should run perfectly with almost no backfire with the screen out, as long as you have that map installed in the ECU.
With the removable screen ("choke screen) removed - does it always have a back fire problem if you have the stock map?
This might be the answer to a question I asked a while back. I was trying to figure out how to make sure I had the Euro map installed.