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this is a problem with the idle air control valve
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INSTALLATION Identify replacement IAC assembly as being either Type 1 or Type 2, Fig. 166. If dimension ``A'' is greater than 11/8 inch, reduce distance as follows: On Type 1, exert a firm pressure on conical valve to retract it.On Type 2, while turning valve in clockwise rotation, compress retaining spring from conical valve. Return spring to original position with straight part of spring end aligned with flat surface of valve.
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