Q: I have a 1985 Toyot 2SE engine. The engine starts and then stalls. I just replaced the timing belt, water pump

Your vehicle probably has a cold start injector time switch, or comparable means to enrich the mixture on cold start to prevent immediate stalling. That component is subject to failure and I would check that first. To generally rule fuel in or out as the problem area, you could introduce starting fluid in the intake to attempt to keep the engine running. If using starting fluid keeps the engine running, that would narrow it to the fuel system. On a vehicle this old, you should definitely remove the fuel injectors from the rail (on car cleaning is useless) and send to a lab for ultrasonic cleaning. Mr. Injector is one I have used. If you want this stalling diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine stalling diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.