The problem was that it would rev high and get no power. They told me that the clutch is slipping and that it needed to be replaced. The clutch pedal was completely to the ground and we had to tow it. We got it fixed and it drove fine for a day. Then I realized it still does it. It will rev high with no power. The car starts bad and starts knocking while idleing. It didnt do this before the repair. So I took it back in and they said to take it back in monday. Im just wondering if there might be another problem like transmission. Btw its a 99 prelude with 73000 miles on it.

 

if the clutch pedal goes to the ground your clutch fluid is probably low or there is a leak in the line. also, there could be air in the system.
Have your clutch fluid flushed and bled.