1998 Toyota Camry fire missing

The car started missing since. Ave changed the plugs, plugs wires, change the fuel pump, change plug wire coil that's 2, 3 and 1, 4. Petrol filter inside burnet. Each time l change those things, it will be fine but l will not drive up to 10min, it will start misfiring again. And if l race it that time of misfire, the engine will off and if l try to start again, it might take awhile before it will answer me or l have to put use one leg to hold my break, use the second leg to press my turtle before the car will start. Please am tied what can l do? And l still love this camry. Is still the strongest among the camry