| Author | Message | ||
     Xrays |
Has anyone done the TPS reset on a 1999 Buell X1? I use the ECMSpy software to perform this task, and then couldn't locate the appropriate tuning screws to adjust the mechanical side of things, and I'm also not getting any TPS information on my computer. Is is possible this function can't be done on my bike, or am I missing something. I looked closely at the throttle sensor, but it appears to just be a unit that comes off and doesn't have any adjustments. I checked the manual, and there doesn't appear to be any adjustments available. All documentation online seems to indicate I should be getting readings on ECMSpy, but I should also be able to adjust things to get back to the 5.5 position. Any idea how to do this? Perhaps this is why my bike isn't starting anymore? x. | ||
| Jramsey |
http://www.badweatherbikers.com/buell/messages/476 23/711093.html?1367352765 | ||
| Jramsey |
Idle adjustment knob.  | ||
| Xrays |
Jramsey: I appreciate the photo, but my bike doesn't have that adjustment. I do have a way to adjust the mechanical idle speed, but that doesn't seem to be what the TPS sensor is expecting. I'm curious how to adjust the sensor to a specific mark if I'm not getting readings with ECMSpy. Attached are two photos. First is the side angle of the engine showing no side adjustment, similar angle to previous posting. Second photo shows closeup of the idle set screw I do have, which is between the cylinders, and can only be reached when the tank is off.   | ||
| Arizona_buell |
It is only required to back out the idle screw until the throttle plate is free to close completely. There is no adjustment on the TPS except to reset it to Zero wich means it is completely closed . Then reset the idle screw to maintain idle.. | ||
| Jramsey |
There is no mechanical adjustment for the TPS. Use whatever method is required to back off the idle screw so the butterfly plate is completely closed then reset the TPS with EcmSpy, then readjust the idle screw as I described in the link above. Here's a throttle body with the idle adjustment cable and TPS.  | ||
| Xrays |
Jramsey: Thanks... This helps. I kept expecting to get some values in ECMSpy, but nothing was showing. I should have new spark plugs tomorrow to try out, so hopefully this will at least get things running again. I guess the '99 models had a different approach to setting the idle speed, because my system looks different. My throttle has two cables, running to the throttle body (one for acceleration, one for pulling back), but there is no cable running off for adjustments, just a screw for adjusting the idle speed and/or tension of the throttle itself. x. | ||
| Xrays |
Update: Installed new spark plugs today, bike starts again, but won't maintain any idle speed properly. If I apply more throttle, it seems to run, but not very well. If I let it idle, it will do so for a moment and then stall. A few times there is exhaust coming from the air intake, a few times it backfires, but most times it just stutters and stops. As of now, I think the only thing I have done to the bike since it was last working well enough to ride is reset the TPS and lower the AFV from 143 to 120 (any lower and it won't start). Video: http://youtu.be/Yd3svIpYVmE This shows me starting the bike, doing a quick idle adjustment to lower the idle speed, and then another start. Both times the bike stalls. Maybe the sounds will help someone diagnose the problem? I will keep tinkering with TPS and AFV in case something makes it run. I really hate to have to trailer it to take it to the shop (42km away, in traffic), so I'm hoping I can resolve these problems locally. x. | ||
| Kalali |
You can buy that idle adjustment cable separately from the dealer and it'll slip right on top of the idle screw. Makes idle adjustment possible remotely. (Message edited by kalali on May 06, 2013) | ||
| Xrays |
Question: Is there an obvious problem with the Throttle Position Sensor if I have never received any values for this unit via ECMSpy? It always reads either zero or blank in those fields on all screens. I'm starting to think that this is the crux of my problems since everything started when I requested the TPS reset through the software a week ago. x. | ||
| Akbuell |
Remove the gas tank, and unplug the TPS from the wiring harness. The TPS side of the plug will have an orange, a green, and a black wire. With your multimeter set on ohms, place the leads on the orange and green wires. Roll the throttle open, and the resistance value should change. Then check resistance between the orange and black wire, and green and black wire, and roll the throttle on each time. Again, the resistance value should change. If that works as described, the TPS is most likely working, and the problem is somewhere else. Since the bike runs for a short time then stops, have you checked the cam position sensor for signs of heat damage? Is the cam sensor plug in tight and undamaged? Hope this helps, Dave |
