are you supposed to be able to tell when your iab's open? my car isnt sluggish at low rpms, but maybe thinking they arent opening at all.

 

Disconnect the vaccum line to the diaphran while your car is running, they should open immediately after you disconnect it.

 

If you remove the vacuum tube to the iab diaphram, you will see the linkage open. Once you reconnect the vacuum, it will close again. Low rpm iab closed, high rpm >4900rpm, iab's open.

 

LudeFanatic beat me post by one minute, damn.

 

lol, thanks yall, ill check it in the morning. but i thought they opened at 4600. thats what it says in my basemap in crome, and that vtec is 4900. maybe its wrong

 

Not stock, stock they open @ 4800-4900 vtec kicks at 54-5500

 

nope. iab 4600, vtec 4900 - IV gen. read the manual first it's in the fuel and emission chapter.

 

what does iab stands for?

 

intake air bypass/butterflies, dual stage intake mani

 

Well, I did this test, and it wont open when I disconnected the vacuum line, while running of course, what can i do? buy new one or?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Vilmar &raquo;</TD></TR><TR><TD CLASS="quote">Well, I did this test, and it wont open when I disconnected the vacuum line, while running of course, what can i do? buy new one or? </TD></TR></TABLE>

im not trying to be an ***, but do you even know where the vacuum line for the IAB's is? how can you find them if you dont know what they are? there are like 3 or 4 vacuum lines going to the manifold.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SteveoBA8 &raquo;</TD></TR><TR><TD CLASS="quote">intake air bypass/butterflies, dual stage intake mani</TD></TR></TABLE>

Because of this, I saw it in the vacuum diagraph in the manual, but there it stands for By-pass Control Diagraph. I think it is the same, right on the intake manifold, am i right?

 

im willing to bet youre running a p28 which has no iab function, so it doesnt matter what your iab's are set to in crome. it wont control them.

are you sure they are not stuck in the open position? on a stock ecu when you start the car they closewhen you turn it of they open.

 

^^^
that was my thinking as soon as you said you were running chrome.
aren't the p72 and 75 the only ones with the iab setup

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VtecFreePrelude &raquo;</TD></TR><TR><TD CLASS="quote">^^^
that was my thinking as soon as you said you were running chrome.
aren't the p72 and 75 the only ones with the iab setup</TD></TR></TABLE>
as far as I know yes
there's definately a thread somewhere that shows each ecu that works for a Lude, and what they can do and are capable of
p72 ftw

 

But this valve's job is to put more air in the manifold, am I right?

But I was thinking, when civic hits the vtec, the sound is MUCH louder then mine.. and when they hit the vtec, its harder then mine, like they torque better then I do

In Iceland, there is not so many H22, in fact I have never seen prelude with H22 passing by, so I cant really compare my car to other, but the sound of mine, is not as loud as civic, and I always loose when I am racing with them, btw, I got h22 JDM with 2.5" exaust.. and the civic too, and short ram intake... So I was thinkin, is something wrong with my car or is it normal? btw, its a swap with h23 tranny..

Yes im a noob

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Vilmar &raquo;</TD></TR><TR><TD CLASS="quote">But this valve's job is to put more air in the manifold, am I right?

But I was thinking, when civic hits the vtec, the sound is MUCH louder then mine.. and when they hit the vtec, its harder then mine, like they torque better then I do

In Iceland, there is not so many H22, in fact I have never seen prelude with H22 passing by, so I cant really compare my car to other, but the sound of mine, is not as loud as civic, and I always loose when I am racing with them, btw, I got h22 JDM with 2.5" exaust.. and the civic too, and short ram intake... So I was thinkin, is something wrong with my car or is it normal? btw, its a swap with h23 tranny..

Yes im a noob </TD></TR></TABLE>


OMG!!!!!! what kind of ECU do you have????? how can anyone help you if you wont say what kind of ECU you have?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by silverlude001 &raquo;</TD></TR><TR><TD CLASS="quote">im willing to bet youre running a p28 which has no iab function, so it doesnt matter what your iab's are set to in crome. it wont control them.

are you sure they are not stuck in the open position? on a stock ecu when you start the car they closewhen you turn it of they open.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VtecFreePrelude &raquo;</TD></TR><TR><TD CLASS="quote">^^^
that was my thinking as soon as you said you were running chrome.
aren't the p72 and 75 the only ones with the iab setup</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ECX &raquo;</TD></TR><TR><TD CLASS="quote">
as far as I know yes
there's definately a thread somewhere that shows each ecu that works for a Lude, and what they can do and are capable of
p72 ftw
</TD></TR></TABLE>

wrong wrong wrong, sorry guys, that was old news...the p28 can now be converted to control iab's as well as other things. it just needs to be specified to the person socketing your ecu...


to the orignal poster. with the car off can you work the butterflies by hand? they are on a spring that keeps them open. if you can turn them by hand, then let go and they open again, you know which positon they are stuck in, open or closed. worst case secernio, its 4 nuts holding the top of the itm on, take it off and look at them...

if they are stuck open you will lose a little on bottom, be the same on top. depending on engine mods some gain in the 4-5k range with them open. you can put them on reg vacume from the itm, then they will open with wot at any rpm and be closed for reg driving.

if they are stuck closed then u will be a dog on top.

to the guy losing to civics, something is very wrong, start your own post and include your whole setup including ecu, mods and who did the swap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bluedlude &raquo;</TD></TR><TR><TD CLASS="quote">


OMG!!!!!! what kind of ECU do you have????? how can anyone help you if you wont say what kind of ECU you have?</TD></TR></TABLE>

Wow, relax

Hm, I did not do the swap, I bought the car like it is now, and my guess, is that i got P13...

Happy?

 

Well, my car has a CEL, no knock sensor signal, and thats why the vtec is not as hard as it should be, okey

 

knock sensor code indicates you probably have a P28 ECU like everyone has been saying, which would also explain why your IAB's arent opening. but no one can give you any kind of help unless they know what ECU you have man. but i guess you dont really want help, or arent that worried.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bluedlude &raquo;</TD></TR><TR><TD CLASS="quote">knock sensor code indicates you probably have a P28 ECU like everyone has been saying, which would also explain why your IAB's arent opening. but no one can give you any kind of help unless they know what ECU you have man. but i guess you dont really want help, or arent that worried.</TD></TR></TABLE>

well he is not the op so if he really wants help, he can look at the code on his ecu and start his own theard. there is a lot to check on his car.

edit: also if he has an old p28 that didnt have knock sensor active it wouldnt show a code, it just would be inactive

to the op try what i said earlier and post back..