Well to start Hello, as this is my first post. Ok, now that we are past that my first problem. On the fuel rail there is a diaphragm on the side the fuel enters the rail, it has a screw in the middle of it. Well I pulled the little plastic cap off it and the screw was out. I screwed it back in a little but I don't know if it has adjustment or not. Does anyone know if has one or do I just screw it in all the way? Second problem, I have a zc motor that under wot it smokes real bad, under any other driving its fine no smoke. I was told to replace the valve stem seals. Has anyone had a problem like this, or does anyone have more possibilities on what it could be. It has about 50,000 mile on it.