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yup, thats right ken, i wouldnt recomend touching that idle adjustment screw unless you replace the IAC or the throttle body. Its pre-set at the factory to work within limits the IAC can maintain a correct idle. In other words, if you turn it too low, at certain temps it wont idle correct while at the cold temps you describe it will idle fine. I would just let the car warm up for about 5 minutes in the morning. I have noticed if i let mine warm up just that long she runs fine and heats up to about 1/4 gauge within 1-3 miles.
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