I went ahead and put a pressure gauge in place of the schrader valve on the side of my fuel bowl, i did this in hopes of being able to see if my fuel pressure was surging, because at idle I can watch the trucks rpms on the engine idle controller jump up and down around 1 to 4 rpms. i think my fuel pump might be going out. but im not sure. also when watching the fuel pressure gauge the needle jumps back and forth (very fast) from like 20psi or so to maybe 100psi, it hard to read because it moves so fast. does any one have a diagram or any good pictures of all components of the fuel system and how they work together. the fuel system is foreign to me so any info would be helpful.