Reply To: Hyosung GT650R EFI (Daewoo ECU) – Won’t hold idle / Stalling issue May 24, 2026 at 10:53 PM #22643 ♠️ M77👑 Admin Topics: 40Replies: 3,033Country: UKBike Model: GT Maybe we have a problematic ECU or the harness plug from ISCV wires need cleaning up and also the same wires at the ECU connector. It suggest the problem lies within there.