Throttle Body hole
08-23-2007, 09:18 PM
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Throttle Body hole How big do you drill your TB hole out to on the NW90? Tune seems to be fine but the car will not idle right now and the IAC is maxed out. Does anyone know how big i should go?
08-24-2007, 01:58 AM
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Your going to have to drill it slightly bigger, check your IAC's if there still maxed repeat. Drilling is really the only way i know. If you crack the throttle blade your IAC will no longer control your idle, and you still risk it stalling on you.
08-24-2007, 08:17 AM
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Originally Posted by Gimp98TNT
Your going to have to drill it slightly bigger, check your IAC's if there still maxed repeat. Drilling is really the only way i know.
I did, and I just have a 224 cam.
You can try maxing out the set screw but you will need to reset and monitor your TPS voltage after doing so. I tried that, but you have a small threshold to work with (>= .5 X <= .69 I think but don't quote me) and I didn't like mine lingering too high within that so it sits right in the middle.
I drilled a couple times to get my IAC proper at idle. I actually went up one bit size on the original hole, and then drilled another smaller hole on the top half.
My IAC is proper now and my idle trims are almost spot on.
08-24-2007, 08:33 AM
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Originally Posted by Gimp98TNT
Your going to have to drill it slightly bigger, check your IAC's if there still maxed repeat. Drilling is really the only way i know. If you crack the throttle blade your IAC will no longer control your idle, and you still risk it stalling on you.
08-24-2007, 04:55 PM
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You can drill it as big as you need. Just keep in mind that as the drill size gets bigger, each step up makes a bigger difference than the last. Sometimes it is better to drill another small hole and just have two. Once you get the IAC counts down under 100, I usually just adjust the screw some to fine tune them.
Nick
Nick
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08-25-2007, 02:22 AM
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Originally Posted by Nick Williams
You can drill it as big as you need. Just keep in mind that as the drill size gets bigger, each step up makes a bigger difference than the last. Sometimes it is better to drill another small hole and just have two. Once you get the IAC counts down under 100, I usually just adjust the screw some to fine tune them.
Nick
Nick
