07-31-2018, 01:00 AM
(07-30-2018, 11:47 PM)Barkingshins_imp Wrote:(07-30-2018, 09:21 AM)SportsterDoc_imp Wrote: Since high idle does not cause the engine to die, I would consider it just an annoyance.It has about 6k miles on it, give or take.
Not all low idle issues may be the IACV.
High idle may not have the same cause(s) as low idle.
For example, it may idle high if the ECM thinks the temperature is colder than it actually is.
Be good to first check electrical connections.
How many miles?
Ridden much in the rain?
Parked in rain?
See DTC info on FSM pages 5-15 & 5-16.
As for riding/parking in the rain, I'd be surprised if that's the cause since the bike hasn't been out in anything more than a light sprinkle for at least a year. This idle issue appeared in only the last month or so.
One thing I noticed on my ride this morning, sitting in traffic, is that the warmer the engine seems to get, the higher the idle climbs. After a particularly long stretch of morning-commute traffic and stoplights, it had climbed up to ~1700 RPMs. This now has me legitimately concerned that something more serious is going on. At this RPM, you can actually feel the bike pulling in 1st, 2nd and 3rd gears with no throttle. It's not a good feeling.
A curious thing, to me, that may or may not point to a solution...
With the engine running warm and idling high, I unplugged what I assume is the TP sensor (left side on the end of the throttle body). The idle immediately dropped down to a more appropriate RPM (~1,100) and it threw a MIL.
I have the appropriate 2-6mm of play in the throttle handle. Not sure what else to check.
Thoughts?
Also... I will definitely be checking electrical connections and your suggested FSM sections when I get home tonight.
Not sure if you have found [url=http://cb1100forum.com/forum/showthread.php?tid=8120&pid=190507#pid190507]post #651 that Sportsterdoc wrote up, but it's a nice step-by-step list of "what else to check".
Anecdote if you don't happen across my story in the previous pages: my '14 standard with 10k miles developed the high/low idle issues to the point of more than annoyance for me. After doing the "point A" from Sportsterdoc's list (copied below), I had 8 rides from 1/2 half hour to 2 hours in length with no problems. This is the point at which I traded-in my CB--dealership offered me $4,600, and it needed tires, valve check, oil change, possibly battery--not a terrible deal considering that I had lost confidence in it. Did the TPS cleaning fix the issue? I don't know. My 8 trouble free rides were mostly in cool temps of the fall and several owners have reported that the issue "goes away" in cool to colder riding temps, only to return with warm to hot temps.
this:
"A. Disconnect Throttle Position Sensor connector (engine OFF), clean contacts (contact cleaner available at Home Depot or Lowes, etc.), check for damaged wiring and reconnect. GO FOR A RIDE. If issue persists, continue"