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Throttle Body Cleaning- Why? 200 1986

posted by  volbro245 on  Sun Aug 1 11:32 CST 2004
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last visit: Wed Nov 6 18:05 CST 2013
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I have read many posts about cleaning the TB on later 240's. So with 200K miles, thought I better see what Im missing. Took the whole thing apart. Found mostly deposits in the lower idle screw assembly. Got that all clean. So now is it suppose to run better? How do you know if you have improved something? Thanks for any info

Mike in Tacoma








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    Throttle Body Cleaning- Why? 200 1986

    posted by  volbro245 on  Mon Aug 2 00:50 CST 2004
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    Thanks for the info- I didnt see any evidence of massive build up in the throttle.Ports were clear. I will check it again next time the flame trap needs service.

    Mike in Tacoma








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    Throttle Body Cleaning- Why? 200 1986

    posted by  handsome greg on  Sun Aug 1 13:57 CST 2004
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    mine was so bad most of the vacuum hose nipples were clogged rendering them useless. that included the idle screw bypass tube thus, idle was "broken." it really improved the ride when i cleaned it.








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    Throttle Body Cleaning- Why? 200 1986

    posted by  rstarkie on  Sun Aug 1 13:26 CST 2004
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    Sometimes the buildup around the throttle plate are enough to restrict the air flow to the point the car will do a lot of stalling at idle.

    Randy








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    Throttle Body Cleaning- Why? 200 1986

    posted by  david hunter on  Sun Aug 1 12:52 CST 2004
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    last visit: Mon Jun 30 22:10 CST 2014
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    Deposits in the throat can prevent the throttle plate from closing all the way, which then can prevent proper operation of the throttle position switch causing flakey idle. If nothing was clogged and deposits were minor you will notice no change.
    --
    David Hunter







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