When cold car stalls an check engine light comes on an car won't shit outta 3rd on 1990 Volkswagen Jetta

Unless u reset computer what could cause the problem

Asked by for the 1990 Volkswagen Jetta
There are so many things that can cause this problem, start with the check engine code, that will be the first clue.
I changed maf sensor both o2 sensors new cat new speed sensors new tranny filter an fluid radiator flush cleaned trottle body new air filter an box I'm running outta ideas my next guess is torque converter cause it only does it when the car is cold