2000 ram 1500 5.9 gas. acts like it has a sticking egr but i can not locate one on it. starts and runs great, then at steady throttle it stumlbles and drops to almost a stall until you lift the throttle. only happens when it first warms up. fuel press stays at 50. o2 sensors drop below a volt when it happens. any one have had this issue or ideas[/align]