Reply To: GD250N – Hanging Revs and Stalling when Throttle opened quickly
I’m back again with some data after a test today!
While thinking about the possibility of an IAC delete and reading another thread in the forum, where someone put a setscrew where the IAC would be. I finally got the idea to just set the IAC to a fixed position in software and ride, and lo and behold! It worked quite well! Revs behaving as expected, mostly stable idle (still occasionally misfiring and dying) I did notice a slight performance decrease to before, which I assume to be because the decreased intake airflow (I suppose it isn’t trivial, as I initially assumed, but I guess if it can idle at 4-6k revs on just the IAC passage it isn’t).
by the end of the ride it also started misfiring/sputtering at low rpm, which I attribute to it running rich once warmed up (like riding with choke on)
I’ll look into ordering a replacement IAC, I’ll also try changing out the little spring on the stepper motor in the meantime to see if that changes anything, (I felt like the motor was struggling to push out the needle when manually setting it)
Again, if you have any thoughts or ideas, let me know!
I couldn’t find a spec for the spark plug cap resistance, so I don’t know if 10.3 kOhm is fine, seems to ignite fine at high rpm as it has from the beginning