Engine not idling right

I did a spark plug change and took stock intake off and put a aftermarket cone filter directly on air filter box, it accelerates fine and seems to be performing good but when I stop and idol it sounds like shit and vibrates! Now is it getting to much air and if so how do I adjust computer to read it? Or is it spark plug issue? Please help

 

Are your idle RPMs higher than normal?

I had that problem after I cleaned the stock MAF sensor.

It went away on its own after a week or so.

 

Try putting back the stock intake, and see if it makes a difference.

 

Found out the Mr.Gasket fuel and exhaust cleaner works really good cause come to find out I had a leak in muffler and cleaning it made it worse so now I had to order new muffler, not getting any back pressure

 

Muffler leak?