I had a buddy with an Integra that had this EXACT issue. He had to get some pretty extensive work done on the head in his case. I'm trying to remember what it was, something about the mechanism that switches lobes? That sound possible to you guys? He had to have something removed and replaced that controled either the cams physical switch over, or the electronical switch over. Same thing though, he would run to VTEC and the car would all of a sudden stall, sputter, you name it HUGE backfire when I was in the car with him. Either way, it was leased and the dealership fixed it that time, but they had the car for almost 2 weeks. Three weeks later his timing belt snapped and did even more damage to the system, they ended up replacing the whole upper 1/2 of the engine almost. Two months later it was repossesed! Some people have all the luck.