07-28-2017, 02:50 AM
(07-25-2017, 02:26 PM)Dave_imp Wrote: So I took the bike when I went to dinner last night. About 5 miles of freeway, and three red lights (each way). The engine had plenty of time to reach operating temperature, but the idle was a perfect 1,050 RPM. This problem sure has me challenged! I'm thinking that maybe something in the way the IACV works is causing it to stick, and not function properly. Does anyone out there understand what controls the input to the IACV, and maybe how it functions? I am convinced that the engine operating temperature has something to do with it because when I unplug the Engine Oil Temperature (EOT) sensor when the idle goes to 1,500 RPM the engine returns to 1,050 RPM. Maybe the EOT sensor is sending a wrong signal to the ECU telling it that the engine is cold and therefore adjust the IACV to increase the idle speed? But I replaced the EOT sensor and this did not fix the problem. I'd replace the IACV, but another member reported that he did this and it did not correct the problem. I'm going to take it out to the desert and make another WFO run to see if this works again, as soon as I get a chance.
(07-17-2017, 04:22 AM)johnf514_imp Wrote: I wonder if there is some sort of planned obsolescence issue going on. As if something in the IACV is not designed to go beyond X miles.
My bike started this behavior around 7K mileage. Anyone else?
I think my problem started around 8k miles also.
I'm having pretty much the same problem as you as I previously posted. While the high idle seemed pretty constant for a while now it seems to come and go at will. I've kinda thrown in the towel and I'm just trying to ignore it now when it happens. Replacing the IACV was a bit of an involved job and made no difference. I replaced the EOT sensor as well.
Vey's Powersports in San Diego (El Cajon) has a new 2014 CB1100 for $5999 - maybe I should just buy a new one!
