1 Voltage at Pin 1 Fuel injection controller plug. Wed Aug 05, 2020 1:58 pm
Tomso
active member
I have been working through the troubleshooting guide and have 1 anomaly that I need help on. The troubleshooting guide states that the measurement at pin 1 for the FICU plug should read 10-20mv when the starter is cranking. I am getting about 450mv (it was 900 but reduced after cleaning the hall sensor plug???).
My big problem is that when cranking, the injectors pulse once or twice and then stay on. This immediately floods the engine which won’t start. Fuel leaks out of the exhaust just aft of the collector. Is this linked to the voltage reading at pin 1? Is the high voltage telling the controller that the engine is running and needs more fuel? Maybe the ignition controller is at fault?
I have checked everything else in the guide and all readings at the other pins are very near the guide’s recommendation. I have replaced the temperature sender (just in case) but no improvement. There is a problem with the throttle position sensor for full throttle setting (idle is OK) but I have disconnected the switch as I read that it should at least start OK without it. The airflow meter and air temperature sensor all OK (though the vane in the airflow meter was completely seized!)
I have a new fuel pump and replacement injectors, I have no means to check fuel pressure but fuel does return to the tank so I believe the regulator is doing it’s thing.
My bike is a project that I bought as a partly dismantled non runner and my initial aim is to get it started so I can assess before stripping it down. It apparently hasn’t run for many years and is a real mess! But I have hopes the the brick will live again!
I would be very grateful if someone in the know can confirm if the high voltage could be causing the FICU to flood fuel, or if either of the controllers or even the hall sensor are at fault?
Many thanks
My big problem is that when cranking, the injectors pulse once or twice and then stay on. This immediately floods the engine which won’t start. Fuel leaks out of the exhaust just aft of the collector. Is this linked to the voltage reading at pin 1? Is the high voltage telling the controller that the engine is running and needs more fuel? Maybe the ignition controller is at fault?
I have checked everything else in the guide and all readings at the other pins are very near the guide’s recommendation. I have replaced the temperature sender (just in case) but no improvement. There is a problem with the throttle position sensor for full throttle setting (idle is OK) but I have disconnected the switch as I read that it should at least start OK without it. The airflow meter and air temperature sensor all OK (though the vane in the airflow meter was completely seized!)
I have a new fuel pump and replacement injectors, I have no means to check fuel pressure but fuel does return to the tank so I believe the regulator is doing it’s thing.
My bike is a project that I bought as a partly dismantled non runner and my initial aim is to get it started so I can assess before stripping it down. It apparently hasn’t run for many years and is a real mess! But I have hopes the the brick will live again!
I would be very grateful if someone in the know can confirm if the high voltage could be causing the FICU to flood fuel, or if either of the controllers or even the hall sensor are at fault?
Many thanks