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Idle is sometimes high 850

Recently I began experiencing high idle when I stop the car in traffic. It happens with warm engine, and idle stays at 1200 RPMs. I have checked the throttle cable and pulley. No stick ups in there. Funny thing is that a slight and quick pressure on the gas pedal brings RPMs to the 850 level immediately.

Anyone knows what might be causing this?

Thanks








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    Idle is sometimes high 850

    maybe the idle air control valve sticks.

    Or there is a bad connection to it. I think when this valve gets disconnected, the spring loaded plunger remains partly open, causing a high idle.

    anyways, you can clean it with carburettor cleaner and reinstall it back. it cannot make things worse.








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    Idle is sometimes high 850

    Sounds like a dirty throttle body.

    Klaus
    --
    Please answer, we need to know if the advice is good or bad. The 164 has a new home, all I am left with are 2 turbos :)







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