Cylinder #5 on 2004 ford escape is missing badly, need help

Cylinder #5 on 2004 ford escape is missing badly, need help My 2004 ford escape V6 is missing badly, borrowed an engine analyzer from a friend and I turned off the engine light, but it read that the 5 cylinder, had a problem! Car ran good for awhile and then engine light came on again and the car ran erratically or missing! Can anyone tell me a specific problem i'm having? Also eating a lot of gas, engine light blinks when reach a certain speed and then stops blinking.