Well, I think I've got a bigger problem than a bad pump. I think that I blew a head gasket. Oil seems ok besides some white foam on the bottom of the oil cap. The coolant is a nasty brown color and there is a lot of black crap in the bottle and I just flushed it a few months ago. I had liquid on top of two plugs on the passenger side and after I replaced them the truck ran better but still hesitates under boost. Going to do a compression test tomorrow to see whats up.