My 2004 EZGO TXT golf cart is lunging and cart jerks the front end off the ground when you just touch the throttle. New motor and forward reverse switch and controller.
Is your EZGO a series or PDS golf cart? Was there a problem before you changed the motor, forward and reverse switch and controller? What brand and model is the new controller?
I've heard horror stories about the cheap ones from ebay and amazon. You can get a good one from any of the forum sponsors. There's also a link in the EZGO resource section of the forum to download a EZGO Service Manual. It has the ITS test procedure in it.