number-1
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| posted on 19/7/19 at 05:47 PM |
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Throttle body butterfly gap
Can anyone advise me how 'open' a throttle body butterfly should be at idle for a cable operated throttle body? Pictures speak a thousand
words if you have any for reference.
Ive asked 2 mates and 1 said it should be closed fully and the other said it needs to be open a bit  
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40inches
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| posted on 19/7/19 at 06:26 PM |
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Not sure what you mean? On my throttle body, I adjust the stop screw to set the idle rpm I want?
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rusty nuts
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| posted on 19/7/19 at 07:10 PM |
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It may depend on what type of idling control you have ? If you have an idle speed control valve the butterfly may well be totally closed, if there is
no idle control then a small adjustable gap is likely.
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CTLeeds
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| posted on 20/7/19 at 04:28 PM |
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As above. My BMW engined car has an idle control valve under the intake manifold which regulates air into the manifold at Idle and this is ECU
controlled. At idle the throttle body is completely closed. I suspect any non ECU car would have a gap at idle.
Chris
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