The Lumina was running really rough for a day. It then died and could not be restarted. The engine cranks fine. The fuel pressure is 45 PSI at the injectors. A timing light and a spark plug test light both indicate a spark is occuring. The injector signals are changing, but I wasn't able to verify either the duration or the voltage swing of the injector pulse. The CAM sensor was recently changed. The 3X crankshaft position sensor feeds the Injection Module and indirectly to the ECM computer. I haven't changed it or feel I know what the voltage or signal should look like. I tried a junk yard Ignition module and junk yard ECM computer with no change to the symptoms. Could the Crank shaft sensor cause a complete failure? Any other ideas? The only recent code was the CAM Senor activity.
Any help would be appreciated.
Wednesday, August 2nd, 2006 AT 11:41 PM