scootz
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| posted on 27/3/17 at 08:37 PM |
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Throttle Body Holes
Evening!
I'm looking at a throttle body and it has a large hole either side of the butterfly - the IAC valve ports.
It also has 2 much smaller holes either side of the butterfly... the one at the top side is around 3mm in diameter and the one on the bottom side is
probably less than 1mm. What are these for?
It's Evolution Baby!
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Ugg10
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| posted on 27/3/17 at 08:46 PM |
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Does it have the usual screw to adjust fine idle, may be it is used for this with an external valve? Just a guess.
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1968 Ford Anglia 105e, 1.7 Zetec SE, Mk2 Escort Workd Cup front end, 5 link rear
Build Blog - http://Anglia1968.weebly.com
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scootz
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| posted on 27/3/17 at 09:04 PM |
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Yep - has a screw on the butterfly opening mechanism.
Not fussed about IAC, so just trying to work out which holes I can block off!
It's Evolution Baby!
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mark chandler
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| posted on 27/3/17 at 09:15 PM |
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I expect they are to grab fumes out the fuel tank via carbon filters.
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r1_pete
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| posted on 27/3/17 at 09:17 PM |
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Is there a screw between the two small holes, like a mixture screw? Some tbs have an air bypass facility for balancing, which sounds like what
you're describing.
Any pics??
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scootz
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| posted on 27/3/17 at 09:25 PM |
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No screw between the 2 small holes. Not linked as they are on different sides of the TB (top one at 12 o'clock, and bottom one at 3
o'clock).
It's Evolution Baby!
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