Toyota Repair: 92 Toyota 4x4 pickup sputtering, toyota 4x4 pickup, fuel mixture

Question
I just bought this truck and I have changed the plugs, wires, air, and fuel filters but it still starts cutting out after a few minutes of driving. The check engine light was on and I checked the codes it showed three. First was the coil code then the o2 sensor code and finally the egr code. I reset them and drove it for a full day with the same problems running but the light hasnt came back on. I hope you can help its a real headache!

Answer
It sounds like there is still an engine misfire, this will cause the O2 sensor code even if the sensor is good it will set a trouble code because of the rich/lean fuel mixture, the egr valve is only on at cruising speeds and if it was somehow sticking at idle it would create an engine miss but at idle only! Does it idle normally without misfire?