Hey I got an 87 turbo. Just did a full rebuild and some extra stuff. I installed 550cc injectors on my fuel rail and it ran fine....for awhile. Now about a week later my number 4 injector now gushes fuel from the rail. I pulled the injector and changed the O ring. I noticed that the injector turns in the rail much easier than the rest. Same problem. I'm using the correct O rings that came with my rebuild kit. Any ideas?