I'm confused by both the original question and jwalker's reply. If the cable is stretched idle shouldn't be affected at all--full throttle would not be attained. If the cable is frayed it may not be returning all the way and not allowing the throttle to close----and the reply---If you are replacing the cable and conduit the cable gets fed through the firewall from the engine compartment to the pedal----pull some slack at the throttle spindle and unhook the engine end--remove the "C" clip from the engine end of the conduit and withdraw the works--remove the screw holding the conduit to the firewall--remove the cotter and clevis pins at the pedal--pull the cable and conduit out of the firewall from the engine side. Installation is the reverse. -- Dave