Reply To: Hyosung GT650R EFI (Daewoo ECU) – Won’t hold idle / Stalling issue

[♠️ M77]

Would it be possible that your coils (on their own) or the HT Caps (problematic things) could be dropping out , wanning so that they fail & the bike cuts off ?

If the ISCV is truly working, have you tried a 2nd ISCV that is new so you can fully rule it out?

Can it ride in general  (besides the idling issue?)

I am suspicious of either the stator pickup coil (wanning/haywire) or engine HT Leads+Coils or the ISCV unit.

I am not sure about injectors yet not unless your plugs are sparking dry / lean ?  or fouled up bad ?

Grab yourself another set of new HT caps and coils to be sure    (Stator , not sure yet but keep that in mind, usually if the stator-pickup coil goes at any point, so does everything on the bike and bike shuts off as it depends on it, the ECU checks that 1st)

I cant remember what the code is on Daewoo as its been a while  , but on my Delphi if the ECU thinks my stator is suspicious , it sends a FI light with flashing sequence to translate to “pickup coil / no signal  or  pickup coil / noisy” etc and bike didn’t start till i replaced it but if it did start, i would see crazy jumps on the RPM meter then it dies.