[AT] pull cable PTO speed

[James Peck]

1998 is over 21 years ago. I suspect that the use of CAN Bus on vehicles and ag machines is more recent. There are CAN Bus accelerator devices that send a CAN Bus signal. I am going to bet on the voltage. But is all sounds like a lot of work to replace a stick. Cecil's accelerator issue sounds like the Toyota Unintended Acceleration controversy.

[Dennis Johnson] That should work if the signal is a simple variable voltage, but i think it might be something more complicated like a “pulse width modulation” signal.

[James]  So can you use a wire piercing DMM test lead to measure the actual voltage command to the engine. If you are maxing out the speed command I would agree with you. In either case, If you use a relay controlled by a toggle switch you could change the speed reference to a potentiometer that matches that of the accelerator pedal when you want the high idle speed.

[ Cecil] The 3126B cat engine is a fly by wire.  There is no linkage... I had to bend the accelerator lever up since I had bent it against the firewall trying to get 65mph out of it hauling a tractor west on I-40.  My 30ft tandem dual trailer with the Belarus w/cab created enough wind resistance that with the slight upgrade going west 55-60 mph was all I could get out of it.  I would think that 275hp  would pull better. Going east It would make 70mph..  The upgrade just kills it.   That is why I think it needs a flash on the chip.