hey the top of my sparkplugs are white anyone know what this means?
i got a d16 turbo pushing 8 psi and 1 step colder plugs went to boti today in joliet car was fine came home and like 3 hours later my car started acting up i would step on the gas normal and it lagged and backfired then when above 4 grand boosting it was fine anyone help me turbo setup for 3 years never had this problem im struck on the cause thanx alot guys

 

Normally the white area of the porcelain has a chalky appearance. If you see the porcelain take on a shine then it is time to change the plugs because the glass that is in the porcelain has been melted and has glazed the surface. If the car has been running rich (due to lots of idling or incorrect fuel mixture) then it is possible to glaze the plugs and short them out during a run because of the sudden heating of the plug with the soot on the porcelain. This glazing appears to be a glossy coating on the porcelain with a splotches of color of greenish yellow or brown. These two different glazings will cause the plug to short out and misfire and raise ring lands or make a popping through the exhaust when going down the track.

Just change em out and see what happens. An inexpensive fix. Good luck