I don't think that would help.
Unhook the cable at the engine end. Chuck a drill onto the cable end. Gently turn it while watching the gauge. Confirm you are turning it the right direction. Slowly increase speed watching gauge. Stop start. Stop start. Change speed. Stop start. See if it ever fails. If it does, now you know the problem is at the gauge end. If you can't make it fail, now you know the problem is at the drive end.