Engine shuts off while driving or idling

Engine starts up fine and drives usually two or three miles. Other times are they get only a couple blocks and the engine wants to start trying to shut down cruising along at 40 miles per hour especially at traffic lights and when letting off the gas to make a turn. I can usually keep it running by pumping the gas you can hear the engine choking and cutting out the gas will catch and take off running usually keep it running by it giving it gas while braking. But it has shut off while the engine is revved up and when it does quit on me at the holder gas pedal to the floor to get it to start back up and it usually starts back up, but sometimes takes a little bit to get it started. When it does start up the engine will rev up real high for 30 seconds or so and after it does shut off. Once I get it running when I put it in gear to try to take off stutters and shuts off. Sometimes I can pump the gas pedal and get it going right. Now just drive across town to work and back home afraid to drive it out of town. When it's not wanting to shut off it runs fine have no complaints.