2004 Nissan Altima

Engine Performance problem
2004 Nissan Altima 6 cyl Front Wheel Drive Automatic 85000 miles

My car has been having a rough idle when in a full stop for the past month or two. I originally thought that it may have to do with an old battery. Yet my father-in-law put another batter that could hold charge and it still has that idle.

The only other thing I believe it could be is that the fuel injectors need to be cleaned.

Do you have any ideas for what it could possibly be?
June 12, 2009.

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