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Strange Idle Problem When Cold 200 1987

posted by  Gimpy on  Mon Apr 22 10:32 CST 2002
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last visit: Fri May 18 15:28 CST 2001
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Car would stall when stopped and idling. Turned out to be faulty spark plug wire. Put in new wires, cap, rotor, K&N air filter and NGK spark plugs. Cleaned out throttle body. Now, when engine is cold, it stalls unless pedal is pumped. Also, when warm, RPM cycles between 500 to 750. Wouldn't think we would need to adjust air/fuel mixture or idle on throttle body after parts we replaced. Anybody know whats going on?
Thanks in Advance








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    Strange Idle Problem When Cold 200 1987

    uid 55's pic
    posted by  john sargent on  Mon Apr 22 13:16 CST 2002
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    last visit: Wed Oct 22 09:07 CST 2014
    [RELATED]

    If the Basic Idle Speed is set to 725 plus/minus 25 RPM when hot, the idle speed cannnot drop to 500 RPM. Go to the 700/900 FAQ and set the Basic Idle Speed and Idle Mixture. Your Idle Air Motor may be old and worn, but if the Basic Idle Speed is properly set, it will help.







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