Take the pipe loose at the well head. Pump straight out of the pipe at the well head, wide open. If the water comes out good for a few seconds or minutes, then drops off suddenly, your well is not producing properly. If the water comes out weak and stays that way, you have a pump problem. Iron could be stopping up the well screen. If this is the case, you need to talk to somebody like (Cotey Chemical) in Lubbock, TX. They do well cleaning chemicals and can probably help you out.