Fuel injector not firing – GD250R
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Bike Model = : Gd250r
Hey I’m new to riding but I bought a gd250r and I’ve gotten it up and running but the fuel injector won’t fire once connected to the bikes harness but I can pull it off and connect it to an external power source and it works any ideas on what to do
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Do you get an error code ? or even a flashing red light
Eg. it will blink in a sequence = 5 blinks, pause , 3 blinks , pause 2 blinks and repeats. = code is 5.3.2 for example then we can find out what it is.
Injectors not firing would either be no connection to the injector from the harness to the ecu, so follow the wires and make sure there is no break in them or verify with a meter , test the injector plug to the ecu connector to be sure the circuit isn’t missing (broken)
Also, have a quick read on this one, it may be for a GT but it gives some more information on the EFI system that may be relevant to your situation:
It is very crucial to make sure the connectors are very clean , use a contact cleaner and fully dry as the ECU does not like wet liquids near its connectors, so dry the connector before re-plugging it.
Also let us know if the fuel pump actually turns on (makes noise) when the key is ON etc.
if red light won’t flash on the dash when key is on. Flick the red kill switch button 3 times max and wait.
Keep us posted.
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Do the tests of checking the harness from injector plug to the ecu i mentioned earlier and i linked a nice pdf above too
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I’m getting power from the ecu to the injector but it’s still not firing it seems like it’s not getting the negative power pulsing
If possible try this: if you could get brand new injectors or spare working injectors from a donor bike seller locally , if the new injectors won’t fire, then it is back to the ECU and the harness to see why it won’t fire the injector.
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i pulled the injector off and used a nine volt battery to test it while priming the system and it worked so im starting to think either my battery has dead cells and its not giving enough power to the injectors or its the negative wire and possible a break or short in the circuit leading to the ecm. when i first bought the bike i was told it needed a new battery and fuel pump since then i have replaced the fuel but haven’t been able to buy a new battery yet.
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i pulled the injector off and used a nine volt battery to test it while priming the system and it worked so im starting to think either my battery has dead cells and its not giving enough power to the injectors or its the negative wire and possible a break or short in the circuit leading to the ecm. when i first bought the bike i was told it needed a new battery and fuel pump since then i have replaced the fuel but haven’t been able to buy a new battery yet.
Get a new injector too, just to cover your bases but dig around in your country for a wrecked GD250, so you have a full donor bike of future parts too and it will have a spare harness + ecu. It will help a lot. I understand the GD series is not as widespread as the GTR , as beautiful as that bike is , it’s a shame it was a limited production like the St7 was. However, don’t give up on it. When it runs, take care of it and it will always be there 🙂
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Not used KEMSOs before, i generally replace the whole OEM thing. Some people have been fine with it as long as it does its job.
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Yeah I was looking and searched it up and it says it pushes 200lph at 43 psi and oem does I believe 60 to 80 and was wondering if it could be over pressuring the system
While i don’t have the exact figures as I don’t use Kemso pumps , i believe the OEM is around 3.5 bar for the GD series but don’t quote me on that as it has been a while since i did any pressure tests on pumps , i usually just replace them now to save time and effort these days.
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Yeah I’ve got the battery and still nothing I used a multimeter on the injector and everything’s working properly so now it’s just looking for a spare ecm for a decent price
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Turns out the injector opens when not on the bike everything’s working so I’m looking at getting an injector for it as I believe it’s a solenoid issue with the injector itself got the correct battery ecm has been tested and confirmed working properly. Just got to find an injector for a decent price
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Turns out the injector opens when not on the bike everything’s working so I’m looking at getting an injector for it as I believe it’s a solenoid issue with the injector itself got the correct battery ecm has been tested and confirmed working properly. Just got to find an injector for a decent price
It was my suspect too
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I’m still getting a 0562 code and when I look it up it says low system voltage I’ve checked all connections and everything’s okay so I’m also thinking somes wrong with the charging system
Regulator and Stator ?
Try to test the stator unit using this topic (ignore that it says 125cc, it’s the same principle) and tell us the stator values?Rectifier – How to Test Stator , Battery , Regulator – GT125R Carby
Battery = Sometimes it helps to disconnect the lights and try again, and have a meter on the battery, if its discharging too fast (the moment you turn the key on), the battery is toast or not enough CCA to crank it ? (battery may be too smaller than OEM size)
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Batter is a 12v 10ah with 280 cca Im not able to test the stator or the rr bc I don’t have a multi meter but im thinking its one of them but I have a mechanic possibly looking at it Thursday. Since I changed the battery its trying to crank over and it even almost sputters to life but injectors still aren’t firing
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