Replying to What is wrong with my car?

i have a 1995 saab 9000 cs and it has been giving me problems.  every time i go to accelerate it sputters and has absolutly no power.  it seems like it is misfiring but im not sure.  when it is idling it sounds really sketchy.  it is not the air filter so i am thinking of just taking it to my mechanic, but it could be expensive and i would rather fix it by myself.  sometimes when i hit 3000 rpm in 2nd gear it will just take off but then quickly starts fucking up again.  i have no idea what is wrong and was hoping someone could help me.