All, I'm diagnosing a KTM 990 that won't run. It cranks (I jumped the aux starter relay to bypass the starter interlock in the starting circuit), and it has spark. The fuel pump is providing fuel at a reasonable pressure. I haven't grabbed a dial to measure it exactly. The injectors flow fluid (cleaner) when I test them off the bike. However, when they're plugged in, they don't flow when I crank the bike, even if I'm supplying external cleaner fluid and pressure, to isolate from the fuel pump. Why don't they open when connected to the bike? I put a volt meter on the injector plugs and I thought I got 12 volts when the key is on but the bike is NOT cranking. It seems to go to about 7-9v when I'm cranking. Can you educate me on what the voltages should be, and when? How does the bike decide when to let the injectors run and when to close them? Why are mine staying closed?