Is there a systematic way that I can use to find out why my fuel presure in a 78 280Z goes down in about one second after I turn off the engine? I tried putting straight Vise Grips WHILE having another person turn off the key. Presure still went down fast. I put the Vise GRIPS AFTER THE FUEL FILTER. Fuel gauge is installed in-line after the fuel filter. I have to CRANK AND CRANK TO START THE ENGINE, so I installed this 100lb. gauge and was I surprised to see the presure going down SO FAST. Norm K. PS: If I have to I will remove all the injectors. Please let me know. My car RUNS well.