looked through the manual(actual Isuzu Workshop manual not haynes or chiltons) and a friend of mine looked over the wiring digrams for all that and found that if it were blown (even though it shows signs of heat) most things shouldnt be working, included cigarett lighter which does work. and as he said, yeah, it had heat, but its still in working condition. gonna try and get a tester if i can find one for the injector plugs tomorro to make sure they are getting a signal. I know the pump is right, its been in for over 4 years, bought it straight from Isuzu. as far as teh screen on it in the tank, will have to get a fuel presure guage on there i suppose. but as I stated when changing the inline fuel filter, I did have fuel running out the lines. thanks again.