2001 pontiac grand prix. 2.8 ltr. Code says bank one sytem too rich. What could be causing the problem? It wants to die out when I take off from a stop, mostly in the mornings.

ITS NOT AN MASS AIR FLOW SENSOR PROBLEM OR IT WOULD BE CAUSING BOTH BANKS TO RUN RICH. SINCE IT IS ONLY ONE BANK RUNNING RICH IT MEANS THAT ON THAT BANK THE OXYGEN SENSORS ARE GETTING A RICH READING. THIS IS MOST LIKELY CAUSED BY BAD SPARK PLUGS OR WIRES ON THAT BANK. THERE ARE MANY OTHER POSSIBLE CAUSES, BUT I WOULD BET IT IS THE PLUGS, ESPECIALLY SINCE IT IS WORSE IN THE MORNINGS WHEN THE CAR IS RUNNING COLD.

You need to get the codes,then work from a
touble chart

MAF Sensor --dirty or bad
Evap System Leaks

A rich reading,doesn't mean a rich condition,
your looking for

Have to start with codes & then start testing,
until you find something not as it should be