I've had an intermittent engine stumbling issue for a couple of weeks now. A few times now, after fully warmed up, under a low load, the car will stumble, pop, but will idle. I try to play with the throttle a few times, it won't go WOT, and no codes are shown. As soon as I think about pulling over, the car goes back to normal. Happened once on the highway, twice on a 40 mph side road. This started before installing an Airtec fmic. I changed the spark plugs, .028" gap, but it happened again after changing plugs. Checked electrical connections on top of the engine, all look good. It's at the 10,000 mile fuel pump window, but it hasn't left me stranded and runs normal outside of the few seconds that it's wonky. I don't know what exactly to watch on the Cobb when it's happening, and with no codes, there's no smoking gun. Not going to the dealer yet. Mods to the car are in my sig.