my 95 corvette has a slight miss in it while idling and when the temp gets up to 200-215 the miss is really bad. i pullled the plugs out and they were black but they look like the electrude was good around it it was black like it was trying to clear itself out. i pulled the code out and it was module 4 code h 18 any help please!!!!!

 

doesnt anyone have a book or something or a link