Do you get any LED error codes on the controller to the left/rear of the seat??? I have a pdf somewhere what the different codes are supposed to mean.
Does it idle down manually OK when you turn the controller off [ controller bypass switch mounted on controller ]??? That should let it operate normally unless you have a cable problem. Cables on mine are operated from a box mounted in the compartment just behind the cab, where the air cleaner and radiator screens are located. You could pop that open and check the cable going to the injection pump. Mine has a controller problem, and I just operate it in the off/bypass mode. Idles down, but never back up. Gonna tackle getting the controller to operate if I ever get time. I just rev it up and run it at high idle, do not really need the auto idle down as much as I use mine.
I believe there are two cables on the manual throttle lever. One I think goes from there to the motor to shut the fuel off when the lever is moved all the way forward. And the other cable goes from there to the above mentioned cable controller in the radiator/air cleaner compartment. That is what I would pop open first, all the cables congregate there.
