unplugged the "TPS"
Posted April 05, 2005 - 04:37 PM
Posted April 05, 2005 - 06:07 PM
Posted April 05, 2005 - 06:52 PM
Hmm.... This is interesting. I am getting some popping when holding midrange throttle settings for more than a few minutes. Is this what you're talking about, and does it apply to the 250 as well?
Posted April 05, 2005 - 07:10 PM
Posted April 05, 2005 - 08:36 PM
Posted April 06, 2005 - 03:40 PM
During normal off road riding the feedback loop instability created by the TPS on the CDI is not an issue. If you really ride it as a dual sport disconnect the TPS and she will ride well for you at steady speeds.
I'm getting major sputtering at 1/4 to 1/2 throttle. Where is the TPS connector so I can disconnect??!!
Posted April 06, 2005 - 06:40 PM
Posted April 07, 2005 - 11:45 AM
Left side of the carb a plastic connector that goes to the carb sensor and is clamped against the frame with a black removable clip.
Posted April 07, 2005 - 09:44 PM
Throttle Position Sensor. It's a safety device IMO that can be worked around.
What is the TPS and what exactly is it supposed to do?
Posted April 08, 2005 - 12:56 AM
Posted April 08, 2005 - 08:15 PM
Posted April 09, 2005 - 05:17 AM
modern dirts bike use 3D mapping in the ignition. two stroke and four. in the old days your ignition would advance the spark as the rpm's would increase. that was it, no variables. now with 3D mapping the throttle opening is part of the information. the weak point is how the ignition is programed to react to the variables. it looks like one of the wr's weak points is going down the road at a steady throttle. the ignition seams to be "hunting". it's got rpm's but the throttle doesn't show that it's open very much. grab a hand full, it'll take off. it's got rpm's and the throttle is wide open. it knows what to do.
an interesting side note (to me at least). yesterday i did my warm weather jetting change. JD red needle and 68 starter jet. i thought i'd go ahead and unplug the TPS this weekend. the bike ran smooth around the neighbor hood. no surging. it did seem that the idle was hanging a little. the pilot fuel screw didn't do much to help. well, always go back to the last thing you did. i plugged the TPS back in. it idles fine now. it's always something.
Posted April 09, 2005 - 05:37 PM