| Author |
Message |
    
Buell920
| | Posted on Wednesday, December 06, 2006 - 08:51 am: | 
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so the other day I had the 10k service done. all went well no concerns found. after the service I rode it home and noticed when I got to my house the idle was at 1,500 rpm. didn't think much of it, maybe it was in the middle of the learn mode. rode it to work the next day and the same thing. after about 5 rides it shot up to 2,300 rpms at idle. the bike runs great no sputter,pop,ping. if I hold the front brake and let the clutch out a little to lug it at a stop it will go to a normal idle until I stop again.
tp reset 2 times
timing is dead on tried forward and backwards no change
eng temp sen still working goes up to 320 with no problem very smooth
changed out ecm with stock
reinstalled race ecm
replaced intake seals (very small leak)
replaced Cal evap plug (cracked a little)
new batt old batt still the same
ran the bike with the scanilizer taped to the it to monitor operations. all O.K
inspected main wire harness
inspected fan
I had it on the dyno but cannot duplicate the concern on the dyno only out on the road after 5 miles or 10 min of riding.
any idea? |
Buell920
| | Posted on Wednesday, December 06, 2006 - 09:00 am: |
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also there is no binding of the thr/idle cables.
and no trouble codes |
Reepicheep
| | Posted on Wednesday, December 06, 2006 - 10:38 am: |
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A very easy check (that is probably not the problem but would be a good thing to eliminate as a possibility) is to check the routing of the wire bundle going into the ECM. It is *really easy* (read: I did it) to route that wrong when you have messed with the ECM or something else under there and create a microscopic nick that is randomly shorting out some random ECM input to a battery terminal.
Any odd thing could happen. Mine triggered the "dump stored error code" behavior, so during random ride intervals, my ECM light would blink "I'm fine!" "I'm fine!" "I'm fine".
I slapped some split loom cable armor around it, and make sure I always route it back correctly. My nick was virtually invisible, it took an absurdly close inspection to find it.
(Message edited by reepicheep on December 06, 2006) |
Justin_case
| | Posted on Thursday, December 07, 2006 - 07:36 am: |
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Sounds like intake leak to me. Even new seals can leak. Test them again. Is the butterfly secure on the throttle shaft? Shaft not broken? Butterfly extremely dirty? Good Luck! |
Buell920
| | Posted on Thursday, December 07, 2006 - 08:29 am: |
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interesting view Justin.
yes we did test the seals. I rotated the motor so each intake valve was closed and caped the top of the body off and used 5psi to inspect for leaks. we had a drop of only 1% over a 10min time frame. we also went the other way with a vacuum test with the same results hot and cold. ( hot test was done with a heat gun ) I removed the air cleaner and road the bike to see the operation of the butterfly as well with no abnormality found.
Reepicheep
I'm still looking over the harness at this point ( again ) but still no abnormality. |
Jont
| | Posted on Saturday, December 09, 2006 - 02:38 pm: |
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Had the exact same symptoms. Intake seals fixed it. There was a little split about 1/4" lengthwise on one seal. |
Old_man
| | Posted on Saturday, December 09, 2006 - 03:15 pm: |
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My XB9S did the same thing.It stopped doing it when I adjusted the idle down a little - now it stays where I set it.
I have no idea why?? |
Neb25
| | Posted on Sunday, December 10, 2006 - 09:54 am: |
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My 04 xb12r did the same thing around 4,000 miles. After about 200 miles of living with it, it went away and never happened again. When it was idling high it was always when the engine was fully up to temp. No idea why.
Good luck |
Jkhawaii
| | Posted on Thursday, December 21, 2006 - 11:48 am: |
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for the engine to idle that HI it needs to be getting more air... so is it from the intake seals or from the throttle body? |
Buell920
| | Posted on Wednesday, December 27, 2006 - 09:30 am: |
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so here is the conclusion:
after much head scratching and just about trying everything under the sun. I took a small amount of gas out of the tank and sent it out to my buddy that races. he had it anilized and it turned out it had 50% more eth than it should have. so I drained the tank and filled with fresh gas and bada bing. the thing runs great. |
Reepicheep
| | Posted on Wednesday, December 27, 2006 - 09:42 am: |
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Wow, it really was bad gas for once, and you even have the proof! Thanks for following up, thats a great data point to have. |
Blake
| | Posted on Wednesday, December 27, 2006 - 12:46 pm: |
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Very interesting for sure. Excessive ethanol. I'm guessing that "50% more than it should have had" means that instead of a 10% ethanol ratio, it was 15%? Please confirm? |
Buell920
| | Posted on Wednesday, December 27, 2006 - 02:28 pm: |
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Blake
the ratio was about 14% of the total blend. this was high for any pump gas. There seems to be more and more E85 going around the states now, so maybe this tanker had it in last time and never flushed before it's refill? who knows. I did get a little lesson on eth from him and how it works. pretty cool stuff. It can realy throw off ion dectection in DELFI systems. I'll get him to send the print out and post it. |
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