I think you may have air in your system; try bleeding it. I would share a diy, but I can't seem to find the one I've used. I'm sure you can find it using the "Search" feature.
"The more you know, the more you don't know," Dave Chappelle
"Man is an emotional animal, occasionally rational; and through his feelings he can be deceived to his heart's content"-Durant
WTT: Black Comfort Seats for Black Sport Seats. PM for info.