Sounds more like a bad coil pack. The EGR is not even supposed to be active when the engine is cold. But a a coil pack, wires and plugs have to work their hardest when the engine is old because it takes maximum voltage to fire the dense cold air in the cylinders.
Any codes, any check engine light/service engine soon light on?
Code 43 is an ignition primary circuit problem, which could be a bad coil pack. Code 11 is loss of Crank and Cam Signal, so I would be very suspicious of the Can and Crank Sensor.
I would resolve those codes, disconnect your battery to clear the codes and go from there, but both of these codes will definitely cause misfire under load.