48v 1000w hub motor cutting in and out at full steady throttle


I am haaving issues now where i push my throttle in, its a thumb throttle, it keeps cutting motor in and out, if i hold it in steady at full throttle it keeps jolting power in and out. I checked all wires and all are connected right and batteries are charged all the way and brand new aswell and only thing i remember doing is a little experimentation with the hall sensor connector to my controller running it disconnected.
Any ideas