Toyota corolla 1993 2e is jerking while running

Could be lots of things
in order from most obvious to least
1.) general maintenance, like spark plugs/wires and fuel filter
2.) failing fuel pump
3.) failing sensors like MAF or TP

bottom line if you have maintained your vehicle do that first
while buying parts have the store pull codes and see what else could be wrong

any further assistance should be directed to the chat room for LIVE questions/answers