You have an efi setup
TPS sensors usually have a smooth sweep of voltage
05-5 volts Some go 0-12
But if you were to back probe the signal wire and step on the gas it should give you a nice steady sweep of voltage up and down with pedal travel
When it’s jumpy the computer doesn’t know where the throttle plate is
So inturn the control didn’t know how much fuel the car wanted to start or run right
So your discovery is right on and your problem should be corrected
Nice job on repair