I have a '92 3.1L V6 Firebird that is burning up plugs. I replaced all six plugs about 2 years ago and about 4 months ago I took it to a shop where they had determined the insulator on one of the plugs inside the head had disintegrated. They did a compression check and I had 150 psi in the head. Now after running fine the last 4 months, it's acting the exact same way. What would cause a spark plug to burn up an insulator like that and what happens to the pieces of the insulator in the combustion chamber? Thanks in advance.
Aug 13, 2007 at 12:47 PM