You can move butterfly as much as you want with ignition off. Inner side of butterfly gets most dirt. You might need to do relearn.rjkoop wrote: ↑Sun Dec 27, 2020 7:04 amSame problem still... And I have some time on my hands. Was thinking about doing a more exhaustive cleaning of the throttle body. I've read on some forums that you can cause issues with the throttle body if you move the throttle body's butterfly flap manually for a proper cleaning. Is that actually the case? Or if you perform the re-learn procedure afterwards you are fine?
I'm kind of surprised I don't get a check engine light to indicator any problem. Kind of thought the drop at warm startup to 200 or 300 rpm (almost stalling) would give me a check engine light for something. Temperature sensor issue, engine running too rich, too lean, etc...
Richard
I'll confirm that. The throttle motor is a plain DC motor working against a return spring, the only way to harm the mechanism is to force it with the key in the on position. However, if you have an assistant or own a brick, the best way to inspect and clean is to turn on the key and floor the pedal. Pay special attention to the back sides and edges of the butterfly at the 12 and 6 o'clock positions, that's where the heaviest carbon will accumulate. An IAVL is de rigueur after cleaning, any carbon you remove from the bottom edges will change the rest position of the butterfly.
Yep. Probably the right way to go. Yesterday I JB welded the plastic piece back on. It actually sat really nice on the valve cover. I ensured a didn't clog the opening. So I'll try to reinstall the tube today. But long term... yes... I guess I've have to replace the valve cover...VStar650CL wrote: ↑Sun Jan 10, 2021 7:12 amYep, that's the purge tube for the PCV system. I've seen people repair them with a properly-sized pipe nipple but I'm not sure I'd recommend it. Replace the valve cover.