yeah im taking the plugs out tonight to clean them.
the purple tops were in the first motor that went bang. i sold the old head of it and number 4 piston had very bad divits on the top of it.
im assuming due to detionation, but the engine was stock standard.
im assuming that number 4 injector must have been dropping in and out for a while and that is was caused the engine to go bang.
the missus who drives the car said it would just start miss firing and carrying on and then every time i was driving it it was fine.
getting back to the injectors are these purple tops hard to come by??