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If your A/C or defroster is on when you start your car, it will shake worse. Your car is in open loop mode when it is cold, meaning it is receiving no feedback from some of the sensors. It goes by a pre-programmed map to determine engine parameters. It doesn't always get it right. When you run the A/C or defroster you drain power off the engine and it has trouble compensating. If this is the case, turn off your A/C and see if the engine runs smoother.
It's a small displacement 4 cylinder. Shaking is going to be normal.
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