I would expect a cable to jam easier as the wire gets gunk. That would happen in my 1969 Dart slant six if I floored it. I would kick the pedal to release it. If it didn't release, I would have just turned off the engine, not talk to 911 for 2 minutes like the Sheriff Dept employee in San Diego did about 10 years ago in a Toyota before crashing and killing the family. There was a plastic protector at the end of the cable which had gotten old and cracked to expose the cable. I cleaned, lubed, and covered with tape to form a dust shield. My 1985 M-B 300D has a rotating rod going to the diesel injection pump. It is even more complicated than Mopar's throttle rod.
