To replace the accelerator cable, loosen the lock nut and remove the cable from the bracket and throttle lever cam. Trace the cable to the firewall, removing any clips or guides, and disconnect it from the accelerator pedal under the dash. Remove the grommet in the firewall and take out the cable. To install, reverse the process, ensuring correct cable routing and applying sealant if needed. Adjust the cable to ensure the throttle plate fully closes when the pedal is released and opens fully when depressed. Check for smooth operation, ensuring it doesn't bind or stick.