| Author | Message | ||
     Hooliken |
When doing a TPS reset in either VDSTS or ECMspy after dialing my TPS to 5.1 my Uly will not idle at all. At idle I am seeing about 6.7 to 6.9 on the TPS to maintain a 1000 RPM idle. Is this normal or should I start looking at other factors? Thanks for taking the time, Ken | ||
| Aussiexbox |
Hooliken,my Ugly is set at about 6.2,at the lesser setting it like yours would not idle,so we ran it up a bit higher and all is fine,so I'd say it don't really matter. Phil | ||
| Treadmarks |
I had the surging around 3k and hated it. New wires helped with the stumble, but the surging was still there. This is what fixed the surging. Think of the TPS as a spring loaded pot. It sends a voltage signal to the ECM and it adds fuel accordingly. Very simple really. The entire process is actually based on the starting point of the TPS in relation to the throttle plate. The TPS has two plastic index tabs that must line up with the tabs on the throttle plate shaft. It seems most TPS sensors are installed straight up from the factory and this is ok for a while. After the bike is broken in, these tabs get a small amount of wear on them and they are no longer properly timed with the true zero of the throttle plate. This is when everyone runs to the stealer to get their TPS reset. It is the combination of wear on the TPS tabs, and lack of technical proficiency of the techs that seem to always provide mixed results. In order to be certain you have a true zero try the following: With your air box assembly and base off, the TPS sensor is right on top of the throttle body. If your TPS has two orange dots, you have the new revision with the vertical alignment tabs. This procedure applies to the old style as well. Adjust both throttle cables so sufficient slack is available. Back off idle adjustment cable until the throttle plate will snap shut without touching the idle cable stop. With a scribe, mark the TPS position by scratching a single line from the throttle body to the TPS. This will serve as a reference point just in case. With a 7mm open end wrench, remove the two TPS mounting bolts and remove the TPS from the throttle body. Clean the debris from the back of the TPS and the side of the throttle body. Apply a small amount of high temp silicone grease to the tabs on the TPS to minimize wear in the future. Replace the TPS but leave the mounting bolts slightly loose and rotate the TPS full left (counterclockwise). Insure the throttle plate is totally closed, then rotate the TPS until you feel the spring make contact with the alignment tabs on the throttle plate. Rotate the TPS slightly clockwise to preload the mechanical zero position and secure mounting bolts. Most of you will notice that according to your reference marks, your new position is just slightly right of the old position. Now your TPS and throttle plate are truly aligned, without play. Connect all wiring and perform a TPS reset, just like the manual states. Now you have a solid TPS zero. Ride and feel the difference. I have no more sneezing or lean like surging. | ||
| Hooliken |
Thanks for reposting tread. Greatly appreciated. I was actually looking for your thread on this yesterday while playing with ECMspy. I am slated to go do some "I am the only son-in-law with a clue." work at my mom-in-laws. I will tear into that project later. | ||
| Id073897 |
There is no "starting point of the TPS", so no need to fiddle around with the TPS itself. This adjustment is done with the TPS reset and the offset voltage is stored in the EERPOM at position 0x12 (? IFIRC) in volts * 10 units . Regards, Gunter |
