I have a 93 Hyundai excel. Something is wrong with the clutch. When I push the clutch in, sometimes it feels like there's no pressure, then I can't get the car into gear, and it grinds when I try. If I pump the clutch, the pressure comes back and I can get it in gear. I checked the clutch fluid reservoir, and it was empty, so I filled it, and it's stayed at the same level for a few days, but it hasn't fixed the problem. Is my clutch going, or is it a fluid problem?