Idle Air Control. It is a valve that allows air for engine running when
your foot is off the gas. If the car runs OK when you hit the gas, it's a
very good bet. Not too expensive and somewhat easy to replace.
Or, even cheaper, buy some carburetor cleaner, take iac valve off , fill it
with carb cleaner, let soak 15 min.
In the mean time spray some on your throttle plate and housing on inside,
get out your toothbrush and start cleaning
most of the time this will do the trick
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