i have a subaru impreza 1998 its drives fine but as soon as you put you foot down it holds back

may be you need a tune up check your fuel filter too..or pump. hope this will help..

Sounds like fuel or maybe a dirty air filter could be dirt in the injectors, bad plugs and wires, try a tune up the car is 10 years old now and probably got alot of Original parts on it.

It could be almost anything. l would think a plugged cat. converter if everything else has been checked(plugs, wires, air filter, etc.)