Bike Can Only Start If I Rev The Throttle
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Bike Model = : GT250R 2013
Hi, my bike is Hyosung GT250R year 2013. in malaysia it is named Naza Blade 250. my bike would not start when I press the start switch. it can only start if I press the start switch while throttling. and I have to continue throttling to keep the engine running. when I release the throttle the engine immediately stop. why is this happening? what is the issue? how do I solve this?
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Sounds like your TPS needs checking (throttle position sensor) and your Idle Control Valve (idle Stepper Motor) = These help regulate idling on the bike.
Check engine clearances (are valve clearances too tight?) or check engine compression too.
This topic below could help, as it goes in more detail on the EFi system
Check the ECU for any error codes, see the manual below to get error codes or “how many times the Red FI” light will flash, see below:
[Download] GT GTR 125 250 R Comet Carby & EFi Service Manual & Hyosung Owners Books
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Me a marvel at the same time 😹
What are the odds! 🙀
Stay warm sir , it’s getting icy these mornings again!
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thanks for the replies. I will look into those after this. I forgot to mention that the FI light is also on. then I turn on off key 3 times, FI light blinking x10 x1 x1 x8, which I think the error code is 0118. I found out online that error code 0118 is related to WTS (I assume it is same as ETS= engine temperature sensor)
Is this also possible cause to my bike problem?
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thanks for the replies. I will look into those after this. I forgot to mention that the FI light is also on. then I turn on off key 3 times, FI light blinking x10 x1 x1 x8, which I think the error code is 0118. I found out online that error code 0118 is related to WTS (I assume it is same as ETS= engine temperature sensor) Is this also possible cause to my bike problem?
If the ET is fautly , the ECU won’t know how to keep optimal fueling as the heat rises , so it has to sense it. However fortunately, you can always remove the ET , get 2 bowls. Cold water and 50% hot boiled water. Get a mercury thermometer in there to get glass readings
If the cold water says 7C degrees , put the sensor inside , get someone with a meter to help you. your hands hold the sensor down to the water but do not allow the “black part” to touch water as it will corrode the pins!
The 2nd person will get a meter out and switch to 100 ohms ===> sensor says 25.5ohms and manual says around 0-10c sensor should be about 30 ohms . Repeat the same process for the hot bowl. These numbers are not true , I am just guessing, the 250cc service manual will tell you the real numbers to look for.
This way you can verify if the sensor is working according to different temperature or if it is behaving faulty (skippy , jumping numbers etc….) , then yes replace the sensor.
It is also very important to make sure the tiny connector is clean and its plug, if there is a bit of rust / oxidization, it means ECU gets less optimal feedback or zero feedback as the current is not enough for the ECU to sense it.
Just like fuel tank, if the float is at the bottom it could say zero ohms ==> dash board says hey your fuel is empty , and a full tank will have a high float, the fuel sensor will report 250 ohms , dash will say you have full = bars of fuel.
Ohms are very important readings for the ECU for sensor like Temp, Fuel , Coils (Stator) , etc
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