Car runs rough and dies on 2000 Hyundai Tiburon

Runs rough and dies. Check engine light comes on and goes off. WE had fuel system cleaned and ran good for a day. Replaced fuel filter and still no better. What could it be?

Asked by for the 2000 Hyundai Tiburon
What is the code that is causing the light to come on? This will be a huge clue as to what may be causing the problem.
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mine was sort of doing the same thing. do u ever have any trouble starting it? if so i would take a look at the crank positioning sensor or even the cam position sensor