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  1. #1
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    High idle when hot

    Is it normal for a B18FT with standard engine management to idle high when the engine is relatively hot (between 2nd and 3rd line on temp. gauge) ?

    Thanks

  2. #2
    Non-member B18ftMOJO5's Avatar
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    Re: High idle when hot

    No idle should hold steady at all temps. Mine does anyway. Baccara b18ft.

  3. #3
    Non-member SCHWARTZ's Avatar
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    Re: High idle when hot

    If you don't have the icv installed or it isn't working properly it will idle higher when hot.

  4. #4
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    Re: High idle when hot

    Quote Originally Posted by SCHWARTZ View Post
    If you don't have the icv installed or it isn't working properly it will idle higher when hot.
    I do have an ICV what can I do to check it and/or repair it ? could it be something related to the sort of 'dump valve' connected to it ? I read somewhere that they usually fail when increasing boost...

    Currently running 15psi on a Saab T25

  5. #5
    Non-member SCHWARTZ's Avatar
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    Re: High idle when hot

    Tbh I have done away with mine to simplify the pipework. I just have mine idling slow when cold as I don't really drive it till its warmed up anyway. Best way to test would be to swap for a known working one and see if that sorts ya problem.

  6. #6
    Non-member SCHWARTZ's Avatar
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    Re: High idle when hot

    Where snouts you based?

  7. #7
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    Re: High idle when hot

    Quote Originally Posted by SCHWARTZ View Post
    Where snouts you based?
    Malta


    haven't got a spare one and most probably I'm the only guy running a B18FT on the island.. no volvo's available for parts neither

  8. #8
    Non-member SCHWARTZ's Avatar
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    Re: High idle when hot

    I'm sure a few other cars share the same valve. The Clio rsi uses same engine and obv 440 460 480 do but ifanyone could search the part numbers and compare.

  9. #9
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    Re: High idle when hot

    Quote Originally Posted by SCHWARTZ View Post
    Tbh I have done away with mine to simplify the pipework. I just have mine idling slow when cold as I don't really drive it till its warmed up anyway. Best way to test would be to swap for a known working one and see if that sorts ya problem.
    How do you adjust the idle speed ?

    The only way I've seen that can adjust the idle speed is by turning the small screw (originally covered by a small piece of black plastic and some sort of 'locking' clip) that stops the throttle wheel..

  10. #10
    Non-member SCHWARTZ's Avatar
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    Re: High idle when hot

    That will open up the butterfly. Best way is to remove a plastic cap to the left of the butterfly and there will be a brass bypass screw that lets air bypass the butterfly.

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