95 probe gt help

ok i just got my first probe and it didnt run.me and my dad tinkered with it some and got it running but it will only idle if you give it any gas it will stall out at around 2500 rpms.i know its not the fuel pump because it will idle until it runs out of gas would this be bad injectors?also there is smoke coming off the front of the motor right under the exhaust header my dad says its just oil burning off but i think its something more serious.any help on my situation would be well appreciated