I was having issues about a month ago. I only run my high boost tune for the track, otherwise, its on the WG spring for daily duty. When I went to put in the high boost tune from June, it was breaking up and bucking. But mine was more so bucking all over the place.
We ended up just adding 10% everywhere but idle, and it cleaned the fuck up, and was scootin again. Conclusion/theory we came to, was the winter mixture. With cold starts being difficult on ethanol, they change the mixture to 70% during winter, rather than 85%. We automatically thought that the extra gasoline would, at worst, just make the car run pig rich, since gasoline is more efficient. Now were thinking I might have been running out of octane, causing it to detonate.
I cant say for sure, but mine ran a LOT cleaner. So maybe its worth a shot?