99 accord ex, no problems. it was after oil changes, a lot of people had recommended to put a cleaner out. it does help though, but i think the best is taking it to the honda dealer and them flushing the injectors with that bg44k stuff.

 

milage on car? I would check EGR function.......make sure that it isn't partially clogged

 

my car is at nearly 90K, how do I check EGR function?

 

it maybe the sparkwires