Just noticed an issue last week, has happened maybe 5-6 times since. Going thru the gears getting up to speed, and it seems like I took my foot of the accelerator pedal for just half a second or so. then normal acceleration. Haven't been able to catch it yet and try to accelerate while it's happening, too random. No check engine light, no stored codes, and totally random. As far as I can tell, seems to be happening under acceleration, but not 100% sure. Bone stock except for additional added cat fuel filter. 66k miles. Any ideas?