Reply To: Miss and backfire under 5k only after engine warms up – 2009 GT650R Forums 🚥 PiT STOP 🔧 Hyosung Technical Help Miss and backfire under 5k only after engine warms up – 2009 GT650R Reply To: Miss and backfire under 5k only after engine warms up – 2009 GT650R Feb 7, 2025 at 1:03 PM #18841 Mark de RooyMember Topics: 5Replies: 64 So I had the ecu out and reconnected it. Now it seems like it’s running good from 2k up. I’m thinking something up with that connection. It won’t idle though. Anything below 2k, it coughs and dies. Tomorrow I will check the isc solenoid and tps.
