My Honda has begun to run a little bit ruff(?) sometimes when idling.

Thanks for your input, next on my list to check will be fuel filter, vacuum lines, EGR. Thanks again.

there is also a problem on most of the 90's and 2000's all makes and models with the main relay having cold solder joints.won't start when it's HOT inside the car,it will crank but not start until it cools off inside the car.this is a very common problem on the hondas.