I am a proud new owner of a 88 FJ62. I noticed that there is a throttle adjust knob on the dash that is not attached to the engine. The engine is fuel injected, so ... wouldn't a throttle adjust be used for a carburetor?
I'm pretty sure the FJ62 has a throttle knob as an option. It should connect to the accelerator pedal linkage via a cable. This is not the same as a choke, which provides a rich fuel mixture for a cold engine. The throttle knob would be used to increase idle during operations such as PTO winching, etc.