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Old Apr 14th 2014, 05:11 AM   #11
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Has the TPS been checked out thoroughly?

Perhaps a swap for a new one may be beneficial.
Or put the bike on a dyno and try to find out/get some insight into what the functionality of the various sensors is like.
On a dyno, it will be possible to watch what's going on under repeatable circumstances.

It does sound like there's an unreliable/inconsistent data stream coming from a sensor of some description, and that's throwing the ECU functionality out.

Start with looking at the simple things first and work up to the more complex things.
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Old Apr 17th 2014, 05:31 PM   #12
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Hey Brad--I replaced the throttle tube that contains the TPS. No luck. That was actually one of the first things I did. Second thing was removal of the charcoal canister.

I'm gonna drive the shit out of it and take it into the dealer while it's happening. Hopefully they can put it on the diagnostics right there. If they don't see it on diag it doesn't exist. Fucking wish it just threw a code or something.

Base map is a novel idea, though, Phil....can't hurt.
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Old Apr 17th 2014, 07:54 PM   #13
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Air leak would be my guess. The O2 sensor business can't be because I unplugged mine to see what it would do to performance and I couldn't tell the difference
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Old Apr 18th 2014, 03:20 AM   #14
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A longshot but try adjusting ebs to get maximum engine braking to see if there is any change.

Good luck
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Old Apr 30th 2014, 03:37 PM   #15
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Long story short: dealer has diagnosed that it was the exhaust valve. The cable and bushings in the midpipe were completely worn out. Exhaust valve is moving, cable was stretched and frayed.

I'd disconnected it a while back, so I'm not sure why it being worn out makes a difference, though perhaps it sits at an angle that obstructs the exhaust? No idea until I can see it myself and take a few pics of the jacked up item.

New parts will be in on Friday. Can't wait....should know within a day or two of riding that the ghost in the machine has finally been exorcised!
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Old Apr 30th 2014, 03:45 PM   #16
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FINALLY!!!! Good luck....
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Old Apr 30th 2014, 04:31 PM   #17
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That's great news man! Hope it's resolved!
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Old Apr 30th 2014, 05:47 PM   #18
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I somewhat doubt that this should be it bit I hope it for you! Best luck - and thanks for the awesome shipment!
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Old Mar 12th 2016, 09:24 AM   #19
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Hey, dragging up an old thread here but I seem to be experiencing the same problems that you mentioned here and an another post about popping exhaust, intermittent high/low idle and slowly dropping from 3k rpm.

My bike has just covered 10k miles, and was fine last week when I did about 100 miles on it. Today I popped out for about 60 miles and on the way out, about 10 miles in I noticed an unusually low idle, I thought it was about to cut out and it did as I was filtering through cars at the lights! Managed to start it again whilst still rolling. Thought nothing of it as I didn't stop much until I stopped for fuel on the way back and noticed a cracking/popping sound at idle.

About a mile from home the throttle suddenly went very lumpy and jerky. And it would idle at about 3k rpm and slowly return down under 2k as normal. My exhaust valve has also been disconnected for the last 7k miles, except for when the dealer connected it again at the 7.5k service.

Did replacing the valve really fix this issue?
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Old Mar 12th 2016, 02:27 PM   #20
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Take 'er to the dealer. My bike was fixed (though it wasn't the exhaust valve) after I traded it in. I don't know exactly what they did, but apparently it's proven to be a rare issue.
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