alright, im trying to put some new spark plugs in my engine and all but one i can't get in. when i try to put the spark plug in, it won't thread. all the other plugs will screw in but one? when i look down into the cylinder it looks like something is in the way and it won't screw. do you guys have any idea of what it could be?
oh and by the way it is a 98 civic ex d16y8

 

no clue got a pic of it?? did you try to remove the debris??

 

i tried but no luck... ill try to get a pic up later but its kinda hard to see