Why does my vehicle makes a roaring sounds when you hit the gas and smells like

What is your question?

I drive an INFINITI G35 and when I press on the gas the car makes a roaring sound and it smells of gas sometimes when I drive it.

What makes this problem better or worse?

It's gets worse when trying to go up a hill

How long has your 2003 INFINITI G35 had this problem?

A few weeks