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Buellxb Forum

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  1. U

    ECMDroid works on latest Android versions.

    PSA: If Google Play Store won't let you download Ecmdroid because you have a recent version of Android, you can download it at https://ecmdroid.en.aptoide.com/app and various other sites across the interwebs.
  2. U

    Stumbles at speed

    Is it coughing through the intake? That's a sign of a lean condition. If you have an intake leak the ECM should compensate for it with factory settings. Step 1 is to check your AFV and then act accordingly. More often then not it's lower than it should be which creates a lean condition...
  3. U

    Why Buell stumbles (research)

    The main reason is that it was never for sale.
  4. U

    NRHS Stage 2 for 07 XB12R

    Actually, in open loop the ECM will not correct for a lean or rich condition. However, the O2 sensor can still be active to inform you about sensed lean condition with a CEL. That way you can do something to fix the problem instead of having the ECM try to compensate for it without you knowing.
  5. U

    NRHS Stage 2 for 07 XB12R

    Why tune to 14.7 to accommodate a narrow band O2 sensor? It will run cooler and have better throttle response at about 14.2. Plus, those sensors are not the most trust worthy. I only keep the O2 sensor active to sense and report a lean condition with a CEL in the event something mechanically...
  6. U

    NRHS Stage 2 for 07 XB12R

    Instead of running CL for economy, I suggest changing your AFR targets in the cruise range to about 14.2. If you run CL you run the risk of the ECM leaning everything out.
  7. U

    NRHS Stage 2 for 07 XB12R

    The FP10153 regulator you listed is the same as stock. If you want 58 PSI (4 bar) the Walbro 135-22 is an option.
  8. U

    Stumbles at speed

    If you have a damaged ECM (common with Ulys) you can expect a laundry list of stored codes. You can either fire the parts cannon at it or do some simple diagnostics to see if you have low fuel pressure or a sensor issue and go from there. There's not much to the system so the process of...
  9. U

    How to diagnose most Buell EFI problems

    Technically you can, but your pump is already regulated by a mechanical fuel pressure regulator so the sensor data would only be good to look at. Adding another O2 sensor does nothing for you either. Adding a baro sensor and optimizing your fuel delivery will make it run better and cooler with...
  10. U

    Loss of power 4000-5500 rpm

    The first step is always to check the AFV to see what the ECM has adjusted itself to, then act accordingly. It's probably running lean like most Buells. Don't change any parts until you've done some simple diagnostics. It's VERY quick and easy to do. rev-mo.com/afv...
  11. U

    Differences between 2003 & 2005 XB9

    The injector service I do includes ultrasonic cleaning, back flushing, leak check, and flow measurement. If there is a difference in flow rate (very common) the injectors can't be adjusted but you can account for it in the fuel mapping. rev-mo.com/fuel.
  12. U

    How to diagnose most Buell EFI problems

    I have added this section below to the troubleshooting page at rev-mo.com/efitroubleshoot. Instead of randomly replacing parts based on a hunch or something you read online you can actually see what each sensor is feeding the ECM and how it effects the fueling, in real time. It may not tell...
  13. U

    Differences between 2003 & 2005 XB9

    You could have a good pump, but a bad seal causing internal leakage. Check your pressure. rev-mo.com/fuel.
  14. U

    Differences between 2003 & 2005 XB9

    That almost always means the ECM is trying to compensate for low fuel pressure. rev-mo.com/fuel.
  15. U

    Misfire when engine very hot, error 13 - Rear O2 Sensor always lean

    Llama, you are close to sea level correct? Since I started requiring people include their AFV with requests for tune files I have found that a vast majority of bikes are in the 85-90% AFV range at or near sea level. Many others have AFV of 120 or more and aren't aware of how dangerous this is...
  16. U

    Ecm

    If your ECM had the "Uly" problem you would see a laundry list of stored faults. Check your AFV which will tell you if the ECM has been compensating for low fuel pressure.
  17. U

    Ecm

    Before changing an ECM or any other part you really should do some simple diagnostics using a Buelltooth and Ecmdroid. If you do have to replace the ECM you're going to need them anyway to do a TPS reset. You can also test the spark plugs, injectors, and fuel pump. Like Cooter said, Uly's can...
  18. U

    2001 X1 Project

    I’ve posted the pulley and belt combination you need twice now. You can lead a horse to water...
  19. U

    New Buell for me.

    You did NOT read on the Buelltooth site that a mechanical problem can be remedied with a "map". On the contrary actually.
  20. U

    ECM correction after new fuel pump

    The air temp sensor and fuel pump codes are remnants of having the bike turned on while those were disconnected, so you can disregard. The AMC error mask should already have been unchecked, but isn't affecting how it runs. Did you check your AFV again? If it's doing the same as before it...
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