Do you have a check engine light on. Does it run fine if you unplug the oxygen sensor?
Unplug the ECT (engine coolant temp.) sensor and check the condition of the 2 prong plug on the sensor. If it looks corroded, replace it. What's maybe happening is the ECT is telling the computer that engine is still cold and is running like the choke is still on after it's warmed up and at operating temp. The ECT is located near the thermostat housing on the intake.
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did you change the dis cap and rotor?
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