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PostPosted: Fri Dec 07, 2018 6:23 pm 
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Joined: Fri Dec 07, 2018 5:58 pm
Posts: 2
Current ride: XB9R
I've been running logs and tuning my bike with the wideband in MLV but I can't seem to eliminate a hesitation/misfire between 2-3k rpm. This happens randomly and i have no idea what to do.

The bike idles great and is pretty smooth in the full RPM range. I've looked at all of the connectors and made sure they were clean and have dielectric grease. It has new DCPR9EIX plugs, fuel pump tested and checks out, coil is good, fresh tank of 93 gas with techron. Timing was checked.

What I've been doing is running the log with ECMdroid. Then taking that log and putting it in MLV VE Analyse. From there I save the changes of that map and put that in ECMspy 1.12.27. Copy the contents of tuned rear fuel map to the front, next I add about 3 extra points across the board. Save burn map Burn full EEPROM and repeat. Does this sound like the standard practice?

Thanks for reading, any help would be appreciated.


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PostPosted: Fri Dec 07, 2018 6:27 pm 
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Joined: Fri Mar 11, 2016 7:28 pm
Posts: 927
Current ride: 1125r XB12X
Location: South
Welcome to the forum.

There is a facebook page for that: Buell ECM tuning group.


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PostPosted: Fri Dec 07, 2018 6:30 pm 
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Joined: Fri Dec 07, 2018 5:58 pm
Posts: 2
Current ride: XB9R
OK, thanks. I saw some questions about tuning and I thought it would be find to ask that here.


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PostPosted: Fri Dec 07, 2018 7:39 pm 
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Joined: Mon Nov 07, 2011 7:10 pm
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Current ride: Buell ulysses
Location: Telford
its ok to ask here :yup:
the person you need to talk too is PASH :worthy: :worthy: he is the local Ecmspy master :worthy:

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PostPosted: Fri Dec 07, 2018 7:50 pm 
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proff. patpending
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Joined: Wed May 06, 2009 8:20 pm
Posts: 14665
Current ride: Victoria Sponge
Location: Bristol - Gateway to all things good
Here's what I would do, forgive me if you have done them already:

1. Put the standard maps back in
2. Do a TPS reset
3. Check and set the static timing
4. Turn the noise abatement logic off
5. Check the inlet manifold seals

Copying the rear map to the front is a big no-no, if you look at the standard maps, you will see the peak fuel flows happen at different speeds on front and rear, and that is to do with the inlet and exhaust interaction which is different on front and rear cylinders. When I tinker with people's ECMs these days, I seldom use a WB sensor because I generally know what is needed based on how the engine and control system work. The standard maps are generally 95% of the way there and the bike should run fine with them.

I prefer 10R12A plugs, but that isn't the problem here...

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PostPosted: Sun Dec 09, 2018 7:25 pm 
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Joined: Thu Nov 26, 2015 4:06 pm
Posts: 43
Current ride: ulysses
Location: Northamptonshire
When i tuned my bike i had a lot of help from Pash and Gunter. The best thing to do is invest in EcmSpy mono and read the tuning guide. If you can get the wide band sensor in the front header then you can tune both cylinders to stoich 14.7 in the closed loop area of the front and rear maps.(Monospy) does it for you when it analizes the logs. This was the best thing i did to my bike it runs great all the time and the AFV stays at 100 . Search for Ulytune on this site it may help.
Good Luck with your journey.


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PostPosted: Fri Dec 21, 2018 11:17 am 
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Joined: Wed Aug 01, 2018 7:58 pm
Posts: 871
Current ride: Buell 1125R
pash wrote:
Here's what I would do, forgive me if you have done them already:

1. Put the standard maps back in
2. Do a TPS reset
3. Check and set the static timing
4. Turn the noise abatement logic off
5. Check the inlet manifold seals

Copying the rear map to the front is a big no-no, if you look at the standard maps, you will see the peak fuel flows happen at different speeds on front and rear, and that is to do with the inlet and exhaust interaction which is different on front and rear cylinders. When I tinker with people's ECMs these days, I seldom use a WB sensor because I generally know what is needed based on how the engine and control system work. The standard maps are generally 95% of the way there and the bike should run fine with them.

I prefer 10R12A plugs, but that isn't the problem here...


Why do you prefer those plugs Pash?

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PostPosted: Fri Dec 21, 2018 1:22 pm 
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proff. patpending
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Joined: Wed May 06, 2009 8:20 pm
Posts: 14665
Current ride: Victoria Sponge
Location: Bristol - Gateway to all things good
Cos that’s what Buell fitted from new and they’ve never given me a problem (made by Champion).

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08 Specialized Langster


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PostPosted: Fri Dec 21, 2018 3:33 pm 
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Joined: Wed Aug 01, 2018 7:58 pm
Posts: 871
Current ride: Buell 1125R
pash wrote:
Cos that’s what Buell fitted from new and they’ve never given me a problem (made by Champion).


Ok. Thanks.

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