car loses power than dies out! on 1998 Nissan Altima

car was misfiring and acting up; mechanic replaced fuel filter, spark plugs and cables, whole new distributor, it worked fine for about 1-month. Now car started acting up; loses power and dies out when i step in the gas pedal! any suggestions?

Asked by for the 1998 Nissan Altima
yea take it back to the mechanic that worked on it and tell him he didn't fix the problem