Hey, I have a ls integra. All the sudden when I drive it at low rpm at slow speed, it lags and seems like it is back firing but also losing power. I'm thinking it was the spark plug that need to be change. What else can it be? thanks for the help.

 

If it is studdering badly at low rpm, but starts to go away at higher rpm there is a good chance its one of your spark plugs. Just swap them all and see what happens.