My spark plugs has carbon deposits on them and its. Causing my car to misfire, stutter and hard start what can I do to fix this problem ?

Most carbon is a by-product of oil being burned, such as from leaking valve seals, valve guides, or rings.

Are you talking about the valve seals and rings on the valve cover gasket if so I had already change them when I changed my valve cover gasket

No. I'm talking about the seals on the valves themselves and their corresponding valve guides. The rings I'm referring to are piston rings.

How old are the plugs? You could try going up a step in the heat range to a hotter plug. According to NGK, carbon fouling is the most common problem with a plug that is too cold.

How old are the plugs? You could try going up a step in the heat range to a hotter plug. According to NGK, carbon fouling is the most common problem with a plug that is too cold.

I buy plugs like every week to 2 weeks when I first get the plugs it cranks right up but after a couple days its hard to start especially if I have the ac or heat right before I start it then it really misfire and hard to start

I buy plugs like every week to 2 weeks when I first get the plugs it cranks right up but after a couple days its hard to start especially if I have the ac or heat right before I start it then it really misfire and hard to start

If it that short a time
Then it sounds like you have internal issues. Have you done a compression or cylinder bleed down check? Good fat spark? Vacuum check?

If it that short a time period
Then it sounds like you have internal issues. Have you done a compression or cylinder bleed down check? Good fat spark? Vacuum check?
I never did a compression check I never heard of a cylinder bleed down check it has good spark I checked that and I checked for a vacuum leak and there was none ill take it to a shop and have a compression check done and ill ask about the cylinder bleed down check