I just rebuilt the pump, I didn't put a new vane body in it, but did vanes, filters, rings and seals.. The filter is a hi-flow material and the Check valve is not really restrictive at all but easy enough to test with it out.. Good ideas please keep them coming, I just don't want to believe it's an amp issue according to the drop calculators I used I should be good.. And the rev up and down does seem like it's building then dumping building then dumping but my bubble pattern don't change (not sure it would anyways)..
And it's runs perfect free flowing which don'tean much..