My spark plug wire were bad so i went to get new ones, and my car recently was running sluggish when its cold. or sometime out of the blue. i changed the spark plug wire and did top dead center for my timing. however, i smell fuel from the inside of my car. i double check the engine bay but i dont smell anything from there. however i check my back seat to see if theres a leak, but there wasnt any leak at all. what could go wrong here? i have a gsr turbo btw.