If i broke my fuel rail pressure regulator sensor on the ps fuel rail when i was tightening the egr nut, could it just be a misfire? I broke the part where the little vacuum nipple goes from the sensor body to the throttle body???? I went out this morning and got it to operating temp and there is a code and i do have a misfire? Can the mis be causing tick?? I have a loud tick from the ps valve cover toward the front. I had the intake manifold off and changed the gaskets and all the cooling mess and water pump, put it back together and this?