danielFromPoland
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I’m considering whether to change it to a Delphi or just buy a new Mitsubishi computer. Now I’ve noticed that the time also resets on the clock. If I turn the ignition off and on immediately, it remembers the time, but if I turn it off and wait 5 minutes, after turning it on again, it resets to 12:00. It also takes a very long time to load the fuel quantity, as if the bar was loading, it doesn’t show immediately, it takes about 30 seconds to show the correct quantity.
does this symptom also indicate a damaged ecu?
Man, thank you so much for all your help! Your advice has been incredibly valuable, and I’ve really learned a lot from this thread.
Just out of curiosity – if I eventually decide to swap the entire wiring harness to the Delphi system, is it a simple plug-and-play swap (just replacing the harness and the Delphi ECU), or will it require some extra tweaking, splicing, or custom modifications to make everything work with the rest of the bike?
I just checked the continuity of all the wires going from the ISCV connector directly to the ECU with a multimeter. Every single wire beeped, so the wiring harness is perfectly intact and there are no broken wires.
This is my ECU. Do you think it’s broken? Is there any way to check it?
When I disconnected the ISCV and bypassed it manually with fresh hoses from the intake pipes directly to the airbox, the bike started up perfectly and held the idle RPM smoothly without me touching the throttle. However, as soon as I hooked the ISCV back up and assembled everything back to normal, the stalling problem returned immediately.
I also checked the physical movement of the stepper motor. When I flip the red kill switch on the handlebar to the “ON” position, the motor extends. When I turn it off, it seems to reset its position – it retracts and then extends again. So mechanically, it appears to be moving and working correctly.
I also checked everything else you mentioned, and it all looks good.
To answer your questions and give you a bit more context:
• Coils and HT Caps: I haven’t checked the coils or the caps yet
• Pickup Coil (Stator): Is there any way to test or measure the pickup coil with a standard multimeter? If so, do you happen to know what resistance or values I should be getting?
• ISCV: I actually have a second, spare ISCV. I tested both of them and they behave exactly the same way. That’s why I concluded that they are working properly. If it helps diagnose the issue, I can take the stepper motor out, turn on the ignition, and record a quick video showing exactly how it moves.
• Spark Plugs : I completely forgot to mention in my original post that I just replaced the spark plugs with brand new NGK CR8E. When I pulled the old ones out, they had a heavy, black carbon buildup on them (they were fouled up black).
Other than the idle issue, the bike rides perfectly fine. As long as I hold the throttle open just a little bit, it won’t stall.
