Power loss help

[Softball jim]

Hello.
i have a issue with my 2006 Electric 48v Club car DS.
I have Great voltage even under load. But when I take off it seams to want to go just fine. But then after about 20 yards it dies off and I have to let off the peddle and then rehit the peddle and it does the same thing. Seams fine and then have to do the same thing again.
I just replaced the MCOR box. And that didn’t seam to be it.
what can it be??

[golfcartg]

Check the connections to ensure they're secure and there are no loose wires affecting the power delivery. It's also worth examining the battery terminals and their connections to rule out any intermittent power loss. If the connections check out, it might be worth investigating the throttle signal to the controller. Sometimes, issues with the throttle sensor or its wiring can cause symptoms similar to what you're experiencing.