Now it's your chance to help the mechanic. As the title says, 2000 DT150 EFI. It was given to me by a elderly customer that had sold his house and wanted it out of the yard. So working on getting it running to rehome it. Ok, the basics, spins over good, excellent compression. Fuel system was full of water, drained and cleaned. Now the oddity. If I disconnect the ignition wire or unplug the harness from the engine, the coils will fire. If I plug in the harness without unplugging ignition wire at key switch, it won't spark. Key on, the high pressure pumps powers up and pumps.
Question is, why does engergizing the ignition kill the spark unless the ECU is somehow killing it? If this was a Yamaha, it would be a cinch for me.
Question is, why does engergizing the ignition kill the spark unless the ECU is somehow killing it? If this was a Yamaha, it would be a cinch for me.