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Just an update. I took the cowling off around the dashboard and found what I think is the Throttle position Sensor. Just to see what would happen, I took the tractor for a test drive with the Load Match Switch in the ON position. Of course it was jerking. While driving, I unplugged the Throttle Position Sensor. After a couple of seconds, the jerking stopped and the forward movement was as smooth as if I turned the Load Match Switch off. The computer started flashing a code Short...Short...Short...Long. I assume meaning Throttle Position Sensor Malfunction. My guess is when I unplugged the sensor the computer saw the input was no longer there and defaulted out and changed the drive operation to standard as if the Load Match Switch had been turned off. I know this does not prove the Throttle position Switch is bad, but that is all I have to go on right now. If you have any other thought as to what may be malfunctioning, I would appreciate you input.
Any other thoughts to my madness?
Thank you in advance. I do appreciate all your advice.
Steve

4310 Load Match Jerking while driving
John Deere Tractors
Replies 12 Post by srichard