steering prblems ....help ..asap!!!!!

So yesterday i was driving my girlfreinds car and it was running fine till i wanted to make a left turn...well it just so happens that the power steering is not working or something is keeping it from turning with ease.
It feels as if you were to be drinving an old el Camino..it sucks...cause you can hear all these f-up noises from the engine bay. can anyone tell me what the problem m ight be?
is it the power steering pump thats messed up or anything else?

i would appreciate some feedback..thanks

95 celica gt 2.2 SOHC:)

Could be the power steering or maybe the linkage between the axel and the steering wheel shaft. Might even check you chamber angles and CV joints. I can give an exact reason because it could involve anything w/the suspention.
Brian