| Author | Message | ||
     Giarcg |
Hello all, I've been lurking since getting my Uly and researching quite a bit, this is my first post. I picked up my 2009 Uly about a year ago and almost immediately it showed all too familiar signs of lean running. Stumbles, surges and firing through the intake were the norm at part throttle settings. Not unusual based on what I've read here. I checked for intake leaks per the manual using propane and also carb cleaner.... no indication of a leak. I dabbled with ECMdroid and read up on data logging and the rest of it but was not clear that the '09 ECU could be remapped. Wasn't comfortable with the idea anyhow. Remembering the success I had with a lambda-shift device I have installed on two of my BMWs I looked into using one on the Uly. A visit to Nightrider.com showed an adapter harness for the Buell. I got a hold of one and snagged one of the AF-Xied units off of one of my BMWs and started experimenting (BMW and Buell ECUs are similar types apparently). All I can say is wow.... what a difference! Problem solved! Rideability improvement across the board. Dramatic improvement in throttle response. AFV went from about 92% to 100% at setting 7 and 110% at 8. (the unit is adjustable). I'm loving this bike all the more now. If anyone is looking for a plug and play solution to lean running I strongly suggest you look into an AF-XiED. One other thing that came out of this exercise is finding out that the intake leak check does not ensure you don't have one. Mine checked good but I took the advice of Steve at Nightrider and changed them. Significant improvement... not 100% but much better. I found the old seals were stuck to the intake manifold, my guess is this was restricting their movement. I changed these before installing the AF-XiED which provided the ultimate fix. (Message edited by giarcg on October 03, 2017) (Message edited by giarcg on October 03, 2017) | ||
| Smorris |
tell us more; such as the exact item you purchased. will it work on the old 06/07 model with only one sensor, ( i think the 09 has 2 sensors, one in each header pipe) any additional info appreciated. | ||
| Portero72 |
Looks like this, perhaps? http://sales.nightrider.com/buell-vied.html | ||
| Giarcg |
What I'm using is: Part Numbers:BMW-AF-XIED (unit) and BuellHA (harness) The '09 has only one sensor. I don't know the differences between the pre and post '08 ECUs but I know there are some. Perhaps someone will chime in. Seems however that since the Xied only modifies the signal from the O2 sensor it should work. Check with Nightrider.... great customer support. Very easy install, disconnect O2 connectors, reconnect them to the supplied harness. Ground wire to battery terminal, power wire to rear accessory plug harness which is switched on by the key. Good to go. 11 settings for desired enrichening, 7 works for me. Portero... not the Vied, the AF-Xied. (Message edited by giarcg on October 03, 2017) | ||
| Teeps |
This device appears to alter O2 sensor feedback to the ECM. Though not as easy; the same thing can be done with ECM Spy for free.  Stock values in the above screen shot. I have knobdicked the O2 sensor values using ECM Spy; noticed no appreciable gain or loss of performance or driveablilty. | ||
| Giarcg |
Teeps, All I can say is assuming your bike could have benefited from added enrichment you did not achieve what the Xied achieves. AFV values alone support the ability of the unit to enrich. Also, I stated that this was plug and play... which is a real plus to non-programmers such as myself. (Message edited by giarcg on October 04, 2017) | ||
| D_adams |
www.idspd.com would have been your best spent money. They have calibrations for most exhaust systems out there (including stock) with vastly improved fueling. I've spent a little bit of money there getting things tuned correctly. If they don't have one that works with the exhaust you have, they can certainly make one. | ||
| Giarcg |
Thx D, can't comment on your "best spent money" suggestion. Once the light bulb went off that the device I had such success with on my other bikes might work on the Uly I was pretty much focused on that. Lambda shift makes a ton of sense to me, it adjusts as my engine changes based on real world conditions. I wasn't looking for a race tune and I'm not saying it provides one. It does a great job of getting the mixture off of the lean edge that EPA regulation induces. Once again I'm thrilled with the results. I don't feel like I spent a lot and it was painless to install. | ||
| Ourdee |
IDS is a class act with an incredible background. Been there, Done that, Got the T-shirt.  | ||
| Teeps |
Giarcg Posted on Wednesday, October 04, 2017 Teeps, All I can say is assuming your bike could have benefited from added enrichment you did not achieve what the Xied achieves. AFV values alone support the ability of the unit to enrich. Also, I stated that this was plug and play... which is a real plus to non-programmers such as myself. Must be the difference between '06 and '09 EFI systems. Or that you replaced intake seals too? I am curious about the resistance values in that device. Did you ever measure it? Would you measure it? Awhile back I found this "plug & play" enrichening device that adds a second IAT sensor. https://www.boosterplug.com/shop/frontpage.html There is some really good info on this site, too. I contacted the guy asking if it would work on a Buell. He thought it might but, he was not willing to develop an application for Buell. Because it would be a diminishing market at best. Also, the booster plug is not cheap. And, at $160 I'm not willing to experiment either. | ||
| Giarcg |
Replacing the seals definitely helped get the bike back to "baseline" but even if it had just rolled off the showroom floor it would still be on the lean side. Has to be to meet EPA regs. As with my relatively new BMWs that were running to spec the Xied added just enough enrichment to the Uly to improve engine operation. I've not measured resistance and I'm a little leary to mess with it. I believe there is a microprocessor involved and I'm not smart enough to not damage it. First I've heard of the booster plug. Interesting read. Guess there is more than one way to skin a cat. | ||
| Teeps |
It's doubtful that there is an IC in the unit as the O2 sensor only generates between .1 and .9 volts. Unless it's a heated (3 or 4 wire) O2 sensor. Those have 12v available with the ignition switched on. https://www.youtube.com/watch?v=Fl3aD1qJrEg But, I understand your reluctance to test it... The problem with tuning any closed loop EFI system is the ECU is hard wired to always adjust fueling back to the nominal air fuel ratio. Note: In regard to EFI, I understand just enough to be dangerous. For me the math just gets too confusing. | ||
| Giarcg |
Not doubtful at all... do a web search and read up on it. "The problem with tuning any closed loop EFI system is the ECU is hard wired to always adjust fueling back to the nominal air fuel ratio." Ok, and what happens when the mixture goes to nominal? Simplistically the O2 sensor reads nominal and sends back a signal to the ECU. That signal gets modified by the unit to be read as lean and the ECU responds with more fuel.... thus the AFV values above 100%. Thus the beauty of lambda-shift. Again... you're obviously curious... research it. (Message edited by giarcg on October 07, 2017) | ||
| Teeps |
This is all the farther I need to go with this conversation. Thanks, it has been interesting... but to no end for me, as my Buell is an '06.  | ||
| Ourdee |
Lambda shift? Are we talking about a photon riding a gravity wave? | ||
| Giarcg |
Kinda - http://www.austincc.edu/wkibbe/lambda.htm |
