Just because it happened to me and it could have been bad. I just replaced mine with the small block repo cable. The issue I had was the bell on the carb end when at full throttle slides over the necked down area where the cable exits the sheathing. The bracket was holding the cable very slightly off plane. So that when it went to full throttle the sideways pressure on the bell held it there. Even with two return springs. I cut off the bell mouth. Just double check that it won’t bind!