Quote:
Originally Posted by dabatman99
My Jetta when it is cold will idle rough, not smooth. When it warms up it smooths out a bit better. But when I turn on the AC, it gets rough again. Any ideas? O2 sensor, or something?
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Had same exact issue on my 98 Jetta...replaced Throttle Body...problem solved. Not exactly what you want to hear since Throttle Body's not cheap, but it's amost certain to be your problem.
...Bob