1991 Chevy Silverado V8 Four Wheel Drive Manual
Ok, this has been killing me all week. I am able to start the engine no issue the problem starts when I go to turn the engine off, all instruments are killed but the engine remains running. The ignition switch is completely functional (i have replaced it twice to ensure this!) The ECM/ECU has also been replaced prior to this problem. I tried pulling fuses under the dash to see if I can trace what is backfeeding the ignition and found that the ecm fuse is receiving power when engine is on and ignition is off, this pwoer is killed however when the engine is off. The only way to kill the engine is to pull this ecm fuse or to stall it out via clutch. I tried locating electrical diagrams to trace the ecm power supply but have come up empty handed. Does anyone have any advice! I'm running outta ideas. I have heard advice that there is a ignition diode of some sort to direct the flow of power to the coils and that this maybe backfeeding the engine as well. I have been unable to locate or support this advice.
have the same problem?
Sunday, November 1st, 2009 AT 3:45 PM