[Groesbeck Hurricane]

Have you followed your mechanical linkage from where it attaches to the pedal until it terminates in the carberators? I would lube the entire linkage, ensure the carpet is not interferring with movement, and check that no dust or wasps or other critters (mice, rats, etc) have built homes in or around the linkage or elsewhere on the vehicle. Start with the small, inexpensive stuff first and then work up.