On the 3rd Sunday of the month I go to a cruise-in that's about 1h30min drive from me; there are 2 other MM owners that attend this event as well, which is why I go. I have made the trip to this event this year in March, April, June, Sept, and today. Approx 10 miles from the location of the cruise-in I have to make a left turn because the highway I need to take splits off, which is where the unusual issue is occurring. Last month when I got to this intersection, after waiting for opposing traffic to clear I began the process of making the turn and for a second the car bogged down and acted like it was going to cut off/stall out, only to resume accelerating and allowing me to finish the turn and continue on my way without any further issues. I just chalked it up to having caught the edge of the brake pedal with my shoe (I wear size 13) when I accelerated to make that turn.
Today, the same exact thing happened again at this same intersection under the same circumstances (waited for traffic to clear, then turned) and I know for certain my shoe did not catch the brake pedal this time. This issue didn't happen during the March, April, and June trips, although I can't remember for certain if I had to wait for traffic to make the turn or was able to coast on through w/o having to stop during those trips. I've experienced no acceleration issues/bogging down/stalling out of any sort anywhere else while driving and have driven the car like I normally do; on the conservative side with an occasional mash on the go pedal when needed. Each trip the weather was dry and temps ranged from 60s in March to 80s in June/Sept.
I know this is a needle in the haystack situation trying to figure out what's going on, so any input is welcome...I do not have a S/C; stock motor with shorty headers.