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Old May 5th 2018, 01:34 PM   #1
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Angry Pissed and confused, please help

Sorry for the double post, but I’m hoping this thread gets some attention from anyone not following my build thread.

I am absolutely fucking stumped.... as some of you might have read in my build thread I’ve been having some issues with the build. I’ve already missed 3 track days, and this weekend is another that I’d REALLY like to make.

So, here’s the problem so some of you don’t have to go scrolling....

The bike idles perfect, starts perfect, and runs great but only at idle. As soon as I give it the slightest amount of throttle, it starts sputtering and jumping and kicking like crazy. I thought that maybe this could be an issue with having the bike on a rear stand and having the rear wheel spinning, so I turned off all ABS, DTC, and EBC. Problem persists. I tried riding the bike around,... and it’s like riding a fucking bucking bronco.... jerky as hell, when trying to barely give it any gas.

So, what have I done? Thinking it was an ignition issue I changed the following:
- Coils
- Voltage Regulator
- Plugs (multiple multiple MULTIPLE times)
- Plug Wires

Thinking it’s a fuel problem I changed the following:
- Fuel (thinking I got bad gas)
- Fuel Pump
- Injectors
- Throttle Bodies
- Throttle Body Wiring harness
- Took the tank off my 899 which runs GREAT,... no fix
- Just today reset the TPS,... no fix
- Reset trouble codes,... no fix

The bike absolutely is getting fuel, absolutely is getting spark and getting plenty of air.

So, I started swapping sensors...
- Both MAP sensors
- Crank position sensor
- Gear selection sensor
- Inlet air temp sensor
- Coolant temp sensor
- Both front and rear speed sensors
- Both oxygen sensors

I am totally fucking lost, depressed, pissed, stumped, baffled, pissed, boggled, confused, pissed, and did I say pissed?....

The ONLY thing left that I can even possibly think would be an issue is the main wiring harness. I’ve got Jarel quoting a BSD race harness for my setup, but I’ve inspected my harness and it’s mint!

If ANYONE has a single CLUE what might be going on here please do tell.... I’m on my knees begging for guidance.

I’m home now, drinking heavily in frustration, but tomorrow I will take a screen shot of the fuel curves and ignition curve from the RapidBike race software. I’ll also video what’s going on and see if someone has had a similar problem.

Keep in mind, all parts that were used and purchased from eBay have been switched out with known good parts from a running bike that I own and know all the history of. I just don’t get it.... this thing should run AMAZIGNLY AWESOME... yet here I am.....

Last edited by JarHead; May 5th 2018 at 01:38 PM.
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Old May 5th 2018, 01:45 PM   #2
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You've done about 20 more things that I would have before consulting a Ducati guru with it on a trailer. Asking on the forum a bit more, will surely do your head in.

I'm not taking the piss.
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Old May 5th 2018, 02:05 PM   #3
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Originally Posted by able duc View Post
You've done about 20 more things that I would have before consulting a Ducati guru with it on a trailer. Asking on the forum a bit more, will surely do your head in.

I'm not taking the piss.
Dude, the closest dealer to me is about 2.5 hours away. And Iíve got the reader to look at the trouble codes. So to be honest, they would probably be just as stumped. The only trouble codes I have are due to having a dash that doesnít match the ECU. Same codes I have with my 899 that has an 1199 dash.

U0301 - Software incompatibility with ECM/PCM
U0323 - Software incompatibility with Instrument Panel Control Module
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Old May 5th 2018, 02:51 PM   #4
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I recall reading somewhere that if you change the ECU you must calibrate the Throttle Position Sensor. Have you done that?


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Old May 5th 2018, 02:58 PM   #5
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Originally Posted by Dingo View Post
I recall reading somewhere that if you change the ECU you must calibrate the Throttle Position Sensor. Have you done that?


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I reset the TPS, didnít fix it, then installed new throttle bodies, reset again and still didnít fix.



Everything Iíve done Iíve only made one change at a time before testing the outcome.

I found another post here where the QuickShift created a very similar problem...

Serious Electronic Problem

Going to see if this is my issue tomorrow morning....
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Old May 5th 2018, 03:42 PM   #6
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Hi mate,
Have you tried running the bike without the Rapidbike unit? Can you return the bike to stock mapping?
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Old May 5th 2018, 03:51 PM   #7
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Originally Posted by jock39racer View Post
Hi mate,
Have you tried running the bike without the Rapidbike unit? Can you return the bike to stock mapping?
yeah he has jock that's why he's so pissed
done just about everything
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Old May 5th 2018, 04:15 PM   #8
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Originally Posted by jock39racer View Post
Hi mate,
Have you tried running the bike without the Rapidbike unit? Can you return the bike to stock mapping?
So, just to be clear, the ECU I got was a Rexxer tuned ECU. While having this issue, I loaded the Termi map that came with the race exhaust, stayed the same, THEN installed the RapidBike, tried running with and without the RB unit, stayed the same. Got the BrenTuning module, reset TPS and cleared all codes, stayed the same.

Iím waiting to hear back from BrenTuning, but will try putting it back to the stock 1199 tune and go from there.

To be honest, the bike runs as if the fuel and/or ignition cuts out completely sporadically. I am really hoping itís a quick shift problem. I already am planning to buy a BSD blip box,... so this will just push me harder to pull the trigger.

Iím a little less pissed now, but just more humbled. I mean Iíve built winged sprint cars, various street rods, top alcohol dragsters and even turned wrenches with Roush and Hendrick NASCAR teams... not to mention worked on F-18ís, F-35ís, UH-60ís, A-10ís, F-16ís, Hueyís & Cobraís as well as various civil aircraft.... and yet this tiny little two-wheeled Ducati has me baffled.....
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Old May 5th 2018, 04:20 PM   #9
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So you don't have a stock ecu to try?
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Old May 5th 2018, 04:24 PM   #10
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Originally Posted by able duc View Post
So you don't have a stock ecu to try?
I do not.... but I can surely have this spare 899 Ecu to be flashed with the stock 1199 map...
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