1997 Mazda Protege Mazda 97 chokes on take off

Engine Performance problem
1997 Mazda Protege 4 cyl Front Wheel Drive Automatic 130k miles

i previously had ask a question, but now I will give you updates, ok;
the car as been to the dealer because it hesitate and stall when takes off, and when stop at lights,
they change the coil, o ring, distributor and cap, rotor, one bad fuel injector(?)Not sure it needed clean all the fuel injectors, replace the computer,
fuel filter, I change plugs, wires, air filter, hoses all of the top parts, from the egr to air chamber etc,
pcv valve, new battery, fuel regulator, one bottom oxygen sensor, change oil, filter new transmission fluid, new antifreeze, secure the air chamber so it not moves, check for leaks, new terminals for the mass air sensors both terminals, new mass airflow sensor, new egr valve, cleaned the chambers both of them, clean the air intake hose check for leaks, new clamps most of the hoses, also I had new battery clamps, prc solenoid valve, last thing that as been done is the maf and the terminals, and the car runs better, but when I am at a stop or light the car stalls and hesitate a little when I drive the car is great, the engine light is off, last time the engine light come in it was the maf sensor but now when I install new terminals the light is gone, I also check all the fuses everything seems good, after all of this it seems that the car as the same symptom as I first started when I took it to the dealer, I also I am aware that the next job is the time belt and the water pump, for service. Please give me some idea what it can be, everytime I take the car somewhere they find one thing or another but not what the real problem is, any help input is greatly appreciated. Thanks
jackdor