I am having trouble with my shallow well goulds JS+ pump. I have several problems and am wondering if they are both caused by the same thing or have separate causes. The first is that no matter what I do, I can't seem to get the water pressure above 36 psi. If I dial down the cut out pressure I can get it to then cut below that but then the pressure slowly drops (my second problem) until it cuts in again. Could this be caused by a leak in the line (either above or below the pump)? Also, I should note that I already replaced the foot valve and removed the expansion tank (which was bad) but am planning to replace but I was hoping to solve this other problem before then.

Any help would be appreciated