4 Wheel Drive/SUVs: 92 Chevy 1500 V8, coolant temperature sensor, chevy 1500

Question
My engine chuggs and bucks when it is warmed up.  Runs great cold.  I have already disconnected the EGR valve which did help alot at low speed,  but acceloration at driving speed it still chugs.  What could be causing this?

Answer
It will be the Coolant temperature sensor or the oxygen sensor. They both change the fuel delivery from cold to hot so this will probably be the cause. the Oxygen sensor is in the exhaust pipe and the coolant sensor will be in the intake near the thermostat outlet right in fron on top