Check the condition of the idle control valve, make sure it's plugged
in, and that the hoses are good. Clean it with brake parts cleaner
if the hoses are bad -- block one side, fill it up, shake it a bit,
dump out the solvent, repeat until it's not dirty after shaking.
Check for other vacuum leaks as well -- manifold gaskets, seal
between manifold halves, air flow meter boot (that one is a pain).
Peter
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