why is my 1995 astro van running rich in fuel

The number one cause of this is dirty/contaminated/malfunctioning oxygen sensors. They get dirty and misread, but there is no code because the unit is working electrically. For most people, I suggest a new one every 60 to 80,000 miles just because they do get dirty, and a bad reading is almost guaranteed to clog your catalytic converter in short order. Also with the price of gas these days, a new O2 sensor can pay for itself in short order. Also, make sure your throttle body is clean.

My van smells like gas i brake and the gas goes down and shakes too much its sounds like a scooter

My van smells like gas and it shakes too much i step at the brake and gas goes down