Installed a bigger throttle then idle surging?! Different design?
04-25-2008, 04:49 AM
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Installed a bigger throttle then idle surging?! Different design?
I got a '99 EK and I got a 62mm throttle from my friend off from a DC2, which is slightly bigger than my original 58mm throttle. First I noticed the extra hole connect to something like a Fast Idle Thermo Valve on the bottom. While my old throttle do not have that extra hole or that thermo, but just two coolant hose connected to the throttle body.
I tried to install that bigger throttle, everything connected, but when I started the car. The idle surge from 1k to 2k then back again. I swaped back my original throttle, everything back to normal again.
My question, is my car not using Fast Idle Thermo Valve? coz I can't find it in my original throttle body, but just two coolant hose connected to it.
Also, is there any 60mm+ honda throttle body that similar to my original throttle body design? I just saw spoon throttle body is similar but it is way too big for my application.
P.S. I just addicted to the throttle response of that big TB
Here is my original TB design:
I tried to install that bigger throttle, everything connected, but when I started the car. The idle surge from 1k to 2k then back again. I swaped back my original throttle, everything back to normal again.
My question, is my car not using Fast Idle Thermo Valve? coz I can't find it in my original throttle body, but just two coolant hose connected to it.
Also, is there any 60mm+ honda throttle body that similar to my original throttle body design? I just saw spoon throttle body is similar but it is way too big for my application.
P.S. I just addicted to the throttle response of that big TB
Here is my original TB design:
04-25-2008, 04:54 AM
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Re: Installed a bigger throttle then idle surging?! Different design? (hkrichard)
mabey your ecu is looking for the fast idle thermo valve and its not finding it and thats whats causing the issue. do you have a chipped ecu?
04-25-2008, 05:14 AM
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Re: Installed a bigger throttle then idle surging?! Different design? (skcivic4life)
skcivic4life, my ECU is non-chipped OBD2 ECU. But i don't think ECU is related to the thermo switch, which is a mechanical switch.
04-25-2008, 08:17 AM
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Vac leak for sure. Did you plug the nipple (in your pic, on the right) that goes on top? I don't believe you have a vacuum line to hook up to that. The other two are for coolant and can be bypassed if desired. If you have a MT then there is no FITV on the TB.
EDIT: Oh, wait, that pic is your current TB?
EDIT: Oh, wait, that pic is your current TB?
04-25-2008, 09:56 AM
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Re: Re: (Blk00EJ8)
all hoses are 100% connected, coz all connector are the same. except there is a hole in the big throttle connect to FITV. my current TB (in the pic) seems to have no FITV. So I suspect that extra hole for FITV is leaking vacuum. Is that MT TB have no FITV? coz mine is MT.
04-27-2008, 06:03 PM
#7
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Re: Re: (hkrichard)
If your new TB has a FITV then it came from an auto. What if you covered up the holes while your idle was surging? Does your idle return to normal?
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