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CB1100 Idle speed instability problem
cel light stays off.
To fool the ecm into thinking the iacv is still connected i connected two 100 ohm resistors into the 4 pole connector as follows;



This solved the "cel" from blinking since the coils are around 100 ohms as well, i tried 470 ohms too but the ecu did not like these values so 100 ohms it is.
If you need some help locally just show someone technical this picture, they will know exactly what to do and put something protective around the exposed parts, we don't want to short out anything.
Also playing with the idea to put 100uf capacitors across each coil of the iacv, this may make the pulses last longer and giving the iacv enough time to move correctly, remember it's only just not running correctly and the two caps may just be enough to help it along, just guessing here with the scope readings in mind.

Just my guess but i think the permanent magnets inside the iacv are deteriorating due to heat, mechanically there is no reason the iacv is not functioning correctly and with the short pulse with it is just not enough energy to motivate the piston reliably, see Dave's results as well.

Thanks for your input Dave!
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RE: CB1100 Idle speed instability problem - by max - 12-12-2020, 07:35 AM

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