As I posted before, I've been dealing with same issue, mines running better, but not 100% yet... I know i've been dealing with multiple issues and I just found another possible culprit. I just found a leak at the intake manifold gasket, which could account for my miss and loss of power at low rpm. I'm not looking forward to this one, not a difficult fix, but I figure half a day and a sore back for a week... Probably take me a couple weeks to get to this one, but I'll let you know if I finally fix the problem.