89 Cavalier trouble starting when hot

Hi I’m Rui da Silva I need help with my 1989 Cavalier. It runs fine if the engine is cold or if I drive without stopping. After the car has been sitting for 5 minutes to 2 hours, and I start the car it runs rough for a while and then it will come back to normal and sometimes it doesn’t even start. I have to wait for about 2 hours and then it will start and run normally again. And if I live it idling when the engine is hot it will eventually stall out. I know this is not a random problem because it only happens when the car is hot and it has been sitting for a while.
I’ve checked my fuel pump, changed my fuel filter, cleaned my gas tank, I have cleaned but not changed my injectors changed my mat sensor and the problem persists. Please E-mail me any suggestions.