i am able to start my engine runs every once in a while. but sometimes when i start my car it starts up and rev goes up to about 2grand then i hear the engine sound like its idleing down and just idle's to 0 and dies out. kinda goes vroommmm then goes rmmm and dies. if any help on what might be the problem so i can atleast have some idea what to look for. thanks for the help

 

Dirty fuel filter, vacuum leak, FITV or think on your intake manifold is dirty.

Sensor conncector loose.

Main relay under driverside dash could be going bad.