Reply To: GD250N – Hanging Revs and Stalling when Throttle opened quickly
Hello again!
A mean flu had me in bed for far too long, so I didn’t get around to the bike in a while. In that time however, I was able to order some wires and adapters which arrived in time for me to use Elmue’s HUD ECU Hacker to get an image of my ECU Flash and do some logging with the bike running today.
Cleared all Errors codes while I was at it, no new codes so far (even after encountering issues with frequent stalling and severe misfiring at the end)
For the Voltages:
Ignition OFF: 12.5V
At Idle: 13.8V
At 5k RPM: 14.4V
Sadly the longer logs, especially the fault testing ones at the end are incomplete, probably because of vibration (I’m a dunce and put the laptop on top of the bike while logging, because I didn’t want to sit on the floor and plugged it into the loosest USB port on the device) I’ll try again tomorrow and share them if they’re complete and I think they could be useful.
What I also tried today, is plugging the IAC passage and disconnecting the IACV and seeing if rev hang persisted.
I honestly could not tell if it was better. I was considering doing an IACV delete and just using the idle adjuster screw, but without tuning adjustments, even at consistent throttle, it was not holding any sort of steady rpm, so I don’t think that’s the way to go.
At the very end of testing it started misfiring more and more at higher rpm as well until it could barely keep igniting consistently. Then it stalled and had a hard time starting for a while.
I did try to get the spark plug out, but because it’s sunk really deep and the opening is very small, I’ll need to find a thin and long 16mm spark plug socket to check what the plug looks like. I’ll probably want to replace it.
Cheers
(Posting for what looks like the 3rd time, as it’s not showing up on the site)