Good post Brian. I have much the same problem. It's not so much a shudder or anything violent, it feels more like there is a bubble of air not getting through the system. My other thoughts besides fuel pressure were 1)high flow cat, 2)I need to have my valve lash set. I know my roommates Integra had a similar problem before he got his JUN headers and the problem was solved. I'm still leaning towards the fuel issue also though.