05 txt series gas pedal intermitten

[bassman205]

First cart will not be last. I have an 05 ezgo txt series 36v. Bought used. Things I have upgraded 450amp controller, 36vhd solenoid, 4g battery cables, cleaned and replaced lugs on foward reverse switch. Installed battery meter. In an atempt to fix this problem replaced ITS sensor and acc. switch. Here is the problem when i press the gas pedal slowly works fine if I press it fast it stalls the motor I say stall because the motor is humming but no go. If I wiggle my foot it takes off like a rocket. It scared me today going up a steep hill and hit a bump my foot was half way down when it happened. It stopped and before I could react rocket time. I know it is not a loose cable unplugged and cleaned and retighted every cable.(twice). I am on my knees pleding for help. It took me 2 years to get my wifes aproval to spend money on a cart. This problem is making my decision look bad. I need all the brownie points I can get. Then I can buy more additions to my cart. By the way it did this before I touched it ( or as my wife says FIXED IT)just not as bad. Thank you for any help.

b.
p.s. wait until she gets the credit card billI may be sleeping in it

[bassman205]

Could it be batteries? It drops to 30v going up steep hills at about 2mph. Next on replacement list.