Hey guys I'm sorry if this is another repeat but i did not find any answers to my question. Is there any way to make sure that my IAB system is functioning properly?

 

it should remain open when the car is off, due to no vacum....when you start the car, vacum should cause it to close untill about 5,600rpm then it will open...

one way to test is open that vtec up on the road.

actually you can see the spring open and close.

 

how am i gonna look at the valve while i drive plus have my hood down?

 

you will feel it pull...one other way to test is to just unplug the rubber hose that connects to the sec.butterfly. pump/suction thing.

if you unplug it you will definately know that it is not working(you get no low end torque at all, due to it remaining open all the time)...don't worry, you can drive it like that and it will not throw a check engine light.

 

If you have a intake on your car and listen very carefully around 5,600rpms you can her the secondaires open.

 

that's the thing... i don't hear anything, that's why i was wondering if there was a better method than just listening for it

 

if i just rev my car past 5800 rpm while parked would i lose vaccuum to the secondary butterfly like I'm supposed to like if i was driving?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by opiumdaze &raquo;</TD></TR><TR><TD CLASS="quote">if i just rev my car past 5800 rpm while parked would i lose vaccuum to the secondary butterfly like I'm supposed to like if i was driving?</TD></TR></TABLE>

No.Then the only why to tell is disconnect the vacuum hose and take it for a drive and then come back and connect it and then take it for another drive and compare the difference.

 

you would def. hear them open if you are driving.. especially in 3rd or 4th gear. just reving that high in neutral or in 1st while driving won't make a very distinct sound when they open.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AlxSiR7 &raquo;</TD></TR><TR><TD CLASS="quote">you would def. hear them open if you are driving.. especially in 3rd or 4th gear. just reving that high in neutral or in 1st while driving won't make a very distinct sound when they open.</TD></TR></TABLE>
No i meant to rev it past 5800 while parked and to visualy look at the secondary butterfly...would it lose vacuum to the butterfly as it's supposed to while I'm driving

 

it will not lose vacum...you have to be driving it on wot.

 

just if you didnt see my post on t-i. here it is..
Very Helpful Picturial Information...

 

It's not this complicated, people. Pop your hood with the engine running and rev it manually while you look at the butterfly solenoid. You will clearly see it move when you hit the necessary rpms and then slowly close back up when you let off.

 

thanks that was exactly the answer i was looking for

 

 

1 question..my gsr has cai and the vtec isnt as loud as the b16 with cai why is that? is it the butterflies?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by z51LS2 &raquo;</TD></TR><TR><TD CLASS="quote">1 question..my gsr has cai and the vtec isnt as loud as the b16 with cai why is that? is it the butterflies?</TD></TR></TABLE>

for some reason..our GSR'S just arnt that loud...guess there mad to be silent killers :-D but im sure your butterflys are working!..oh and GSR vtaaakkkk hits at 4400 rpms so you wouldn't hear it unless you had a exhaust or runnin open headers :-D

 

sorry for bringing this back from the dead but i need it.

 

it always feels like it hits at 6200 in my car, but it feels lie it pops open and the motor screams

 

damn i miss my operational butterflies

 

I have all stock parts on my car and i only feel a little pull when they open up. I cant hear the difference either.

 

I can CLEARLY hear it around 6000-6200 and slightly at 4200ish

 

butterflies open at 4500 and vtec crosses over at 5500. you can hear it. you'll hear two different notes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by diLLy &raquo;</TD></TR><TR><TD CLASS="quote">butterflies open at 4500 and vtec crosses over at 5500. you can hear it. you'll hear two different notes. </TD></TR></TABLE>

You guys got it mixed up VTEC is at 4400 then the butterflies at 5600

 

i have a question.. whyt do you lose power when you have both of the runners open ?? i would have thought that you would possible gain a little hp from it but it seems as though you lose it :-(