Why does my car is discharging Gas through the exhast pipe ?

What is your question?

My car was runing good but on sat i was driving on the fwy and as soon as i got off the fwy the car feel like it was slowing down lost power i would step on the gas pedal and it would not gain power than started to smell like gas drove it home like 1.5 mile from the fwy , than check the tail pipe and it was dischatging gas