87 E150 van-Gas Pedal Problem: Cable?

Gas pedal suddenly stopped working..... to the metal, no response.

When let engine cool a bit, start up, engine revving, can get in any gear and go... for as long as engine is revving. then slows to almost 1 mph.

Is this a cable or connection problem?
Any diagrams to fix?

thanks for any help,
ReneO

Accelerator cable is either broken or disconnected. New cable for my 91 cost about $105 from Ford