Were thinking that my IAB were not opening causing that off the scale rich spot. If anyone knows what to do or where to find them please post some picts or something. thanks.


Modified by MyVtec8yourV8 at 10:18 AM 12/31/2004


Modified by MyVtec8yourV8 at 10:30 AM 12/31/2004

 

Can you list your modifcations and what type of Prelude you own?

 

im having that exact same problem, in the same spot. although my vacuum canister is busted, so mine are always open. we'll see if a new one fixes the problem. they said the canister not holding a vacuum was causing it to dip rich right after vtec. but ill find out if it fixes the problem after its replaced.

i want it fixed asap, so ill keep you updated. and if you find out what was wrong with yours, post as well


btw, are you using a p72?

 

its a 94 JDM h22a
darton sleves
eagle rods
t3/t4 turbonetics
2.5 custom exaust
gutted cat
uberdata

 

boost level? compression?injectors?

 

oops oh yea...
DSM 450 injectors
9psi
9:1 comp

 

Nice numbers.

 

All I see is a red x.

I want to see the numbers

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by staticrex &raquo;</TD></TR><TR><TD CLASS="quote">All I see is a red x.

I want to see the numbers </TD></TR></TABLE>


yea, pic is gone....

 

nice #'s man, keep modding. and keep eating V8s

 

 

what trim turbo?

and it looks like all you need to do is play with uberdata quite a bit more to fix that rich spot. if the IABs fail they will be stuck OPEN.

 

 

yea the numbers are OK.. but not good... there is a big problem here i think its to do with the IAB but maby not.... we ran 8 times on the dyno burning a new chip everytime and it still didnt get it right.... we took 30% fuel out of the 5200-6200 range and still off the scale rich..... I need some help here.....

 

well open the hood, have some one rev the car, and watch for the secondary diaphram to disengauge and then reengauge once the revs fall

you should be tuning using a romulator, then burn a chip wehn your done.

you obviously have to much fuel,

and what kind of widebna dwas this, was it a tailpipe sniffer or was it in the downpipe?

edit: also who is doing the tuning on this car, 12.5:1 is a little leaner than i would run in full boost, do you know what your top end timing is set at&gt;

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2point2 &raquo;</TD></TR><TR><TD CLASS="quote">what trim turbo?

if the IABs fail they will be stuck OPEN.

</TD></TR></TABLE>

well if the canister breaks and there is no vacuum then they would be open all the time, unless they are stuck closed...but what if it holds vacuum the whole time, then it would stay closed...

quick test. go outside and have some one start your car, you should see them close. then pull the vacuum hose then should open back up again. if they don't move then make sure you can open and close them by hand. as long that they work by hand, (stays open all the time, only closes when you push against the spring) then its easy, if they are stuck closed we'll address that.

if they work, but the canister is broke, just run a vacuum line from the itm to it...this is my own thought here, i haven't had a chance to test on the dyno...but, holding them closed till xxxx rpms for low end power works great on na engines, but your turbo'd which is pushing a whole lot more air and likes to breathe. when your just putting around the line you put on it will keep them closed, the second you floor it they open up.

 

I'm going to be running a t3/t4 turbonetics... I hope i make better numbers than that.... How many lbs. of boost are you running? What kind of manifold are you running?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sam1am26 &raquo;</TD></TR><TR><TD CLASS="quote">I'm going to be running a t3/t4 turbonetics... I hope i make better numbers than that.... How many lbs. of boost are you running? What kind of manifold are you running?</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MyVtec8yourV8 &raquo;</TD></TR><TR><TD CLASS="quote">oops oh yea...
DSM 450 injectors
9psi
9:1 comp</TD></TR></TABLE>

Reading owns you

Numbers are ok, but i also think you should be getting more power with your setup. Good luck and nice setup

 

if you thought that was the case you could have pulled the vacuum line right on the dyno and run with them open the whole time...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94_HATCH &raquo;</TD></TR><TR><TD CLASS="quote">Reading owns you </TD></TR></TABLE>

yes, but the trim is still not known... there is not a lot of talk about t3/t04e trims when it comes to h22a's.. i have a 57 trim right behind me so i was just curious..

are yoiu using a b-series BIN file? the VTEC comes in late. or maybe your using a BIN for a 3 bar map sensor? that would really screw things up (i think)... or maybe it's not scaled for those injectors?

Scrap the bin your using now and start off with something else. I'd be affraid of ring wash with a a/f like that.. and maybe pay attention to fuel pressure the next time around.


Modified by 2point2 at 9:57 AM 1/2/2005

 

Nasty little fuel problem, but still pretty good numbers

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2point2 &raquo;</TD></TR><TR><TD CLASS="quote">
I'd be affraid of ring wash with a a/f like that.. and maybe pay attention to fuel pressure the next time around.


Modified by 2point2 at 9:57 AM 1/2/2005</TD></TR></TABLE>

Exactly. You better get that tuned out bud, or not spend too much time in that rev range.

And don't be scared at how much fuel you're taking out; just make sure your O2 sensor you're tuning by is in good shape, and then tune it till the a/f curve shapes up.

 

i found my IAB box.. it was in the bottom of my tool box... There for it was not workign correctly when i went to the dyno... i also took a run wth and without a vac line pluged up to the IAB plunger..... so it looks like the IAB isnt the problem...

 

UBERDATA

 

lol im already tunign with uberdata