Hi LukeHS3, best to do data logs with vag-com. There might have been a problem before loading the revo map, with increase boost and fuel the problem just got bigger and thats why the surge. My experiences with similar symptoms where spark plugs but that does not mean you have the same problem...
I'll keep an eye on this thread, i have a simular problem. I changed my shock top mounts and bearings but i still have this slight knocking noise driving on bumpy roads.
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