Join Date: Nov 2018
Location: Texas Hill Country (1hr NW of San Antonio)
Mentioned: 2 Post(s)
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I'm arriving to the party late (but hey, I brought BEER!)
Didn't think plugging the PAIR would matter one way or the other. All it does is pump some air into your exhaust to help burn any fuel that gets that far. Don't see how it could/would cause surging, but you do what the 'tuner' says before anything else, so good on ya.
This time, Dano is more likely to be right. TPS goes to c-r-a-p all the time because it is basically a rheostat and where the throttle spends the most time, the wires get rubbed the most at that point, and eventually it can cause issues as they wear thin/break. BUT...I still don't think that's the problem (unless you have 15,000 miles or more on your bike already?)
I would synchronize the throttle bodies (TBS). Seriously. Your bike is running good EXCEPT low speed, steady idle, steady throttle type situations. If the throttle bodies are out of synch, you won't really notice it when riding hard through the twisties and such. But you will notice it at steady throttle settings. If you have the mercury gauges (or whatever the environmentally correct device is now...I have the mercury gauge still) then it is 'free' to check it and set it, vs. spending $85 to $90 for a new TPS. Maybe a friend has the device to synchro your throttle bodies? This would be my 'next step.' It will make the bike run better, no matter what, so even if it doesn't 'fix it' (which I think it might) your bike will be improved.
For what it is worth, I didn't see you expecting perfect either. You just noticed something wasn't right and are trying to sort it out. You don't have to go to a dyno tuner and spend a bunch of money to solve this. The Dano's flash is "good". Something else is going on with your bike. Might be a simple vacuum leak (well, come to think of it, those can be a pain to find/fix, so let's hope the TBS fixes it.)