I recently did a motor swap after my previous motor went to hell. When I first test drove it I noticed in neutral when I rev the engine up it won't go past 4.5k. It sounds like a fuel problem however when you put it in drive the revs go fine through the fuel cut at around 6.25k. However from a stand still, if the throttle is less then 30% the car boggs out and sometimes backfires out the intake. It doesn't do this at all if the throttle is 100% but it is still a slow pull off. What do you guys think could be the problem?

 

Anybody???

 

i had a weird problem like that to when i had the vafc on the f22b1. if you step on the gas it almost dies and blows black smoke, then once it gets above 3k it's ok. i disconnected it and recconected when i got the H22.

it's cause there is no diagram from apexi for that motor, so you need to get an ecu pinout diagram and figure it out.

 

show me your settings,

crossover
lo > hi
hi < lo

as well as fuel settings +/- fuel% And at what rev.

most likely a bad tune, let me know what mods you have too, also there is a diagram from apexi for the F22b1 i have used the chart to install probably 8 or 9 vafc's in accords and none of them have had problems to date.

 

they must have changed that, cause when i had problems with mine apexi said it was not approved for the f22b1. i used the H2-a diagram.

 

My lo to hi is 3800
my hi to lo is 3500

My fuel correction is as follows:
2k | 3k | 4k | 5k | 6k
-2 -4 -8 -12 -14 (in percentages)

Forgot to mention the accessories:
AEM: fuel rail, FPR, CAI
DC: Headers 4-2-1
Hi flow cat
Greddy cat back
automatic tranny
(in case it matters ac and ps have been removed)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sparknblaze &raquo;</TD></TR><TR><TD CLASS="quote">My lo to hi is 3800
my hi to lo is 3500

My fuel correction is as follows:
2k | 3k | 4k | 5k | 6k
-2 -4 -8 -12 -14 (in percentages)</TD></TR></TABLE>

anything +/- 10% can lead to problems with the ecu

if have not dyno tuned your car you should not be playing with the settings that agressively anyways. i would not do more than +/- 5 before getting on the dyno.

i would make you vtec on at 3500 and off at 3300.

 

I touched nothing. The tuners at the dyno did that. I actually moved them +1 at each interval because My friend said I was running too lean. I got it dynoed the day after I got the VAFC installed at Altered Atmospheres in Gaithersburg MD.

 

why not call them back on it?

 

The problem started before the motor swap which was about 3 weeks ago. The vafc was installed and tuned about 6 months ago.

 

what pins did u hook the vtec up to from the vafc. in the book it says what pins but the pins are not there. as of how i am not using the vtec part. it seems that when i adjust mine it dose nothing to the way the car runs. will the vafc make ur car run shitty when it is nearly stock when u mess with the settings or did i just hook it up wrong

i got this for the vafc hack for the 450cc injectors

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sparknblaze &raquo;</TD></TR><TR><TD CLASS="quote">My lo to hi is 3800
my hi to lo is 3500

My fuel correction is as follows:
2k | 3k | 4k | 5k | 6k
-2 -4 -8 -12 -14 (in percentages)

Forgot to mention the accessories:
AEM: fuel rail, FPR, CAI
DC: Headers 4-2-1
Hi flow cat
Greddy cat back
automatic tranny
(in case it matters ac and ps have been removed)</TD></TR></TABLE>


what press is the FPR set to? a couple of post down you said it has been installed and was working fine? or maybe i misunderstood. in anycase try these.

lo to hi is 3500
hi to lo is 3400

~ you want the least amount of rev's possible between the hi/lo lo/hi points because this gives you the least room having to tune in VTEC unmatched setting also i just think inbetween the two point is kind of a gray area AND your not going to fall back that far in rev's ever when racing so you dont need space for a fall back rev. you may also try the 3100-3000 setting, you will "feel" this less but it sometimes yields more power if you can get your fuel right.

from your fuel setting's i gather you have some unused points? try using i think theres 9 points? or 8 i cant remember let me know how many points you get to pick and ill give you better fuel settings. it looks something like your FPR is allowing to much pressure ( also bad on your injectors ) because with your mods you shouldnt need anything under -10% and youve got -14% also you should only have touched the fuel settings in the Hi throttle Hi VTEC map. since low throttle stock settings are fine and in low throttle your putting around town, you might try a -1/3% change but that would be just to save gas IMO.

monitor your throttle for about a day or so with the way you drive around town, youll want to set your lo-hi throttle point about 5-10% above what you usually hit around town, this will give you the fastest throttle response when you need it but wont have you bliping back and forth between hi and lo throttle settings around town. if you drive really precise you can get throt point closer than the 5-10%.


sorry i rambled, again i need your FPR press, and the total slots available to input revs for fuel corrections.

 

My fuel pressure is set to stock 33psi. I have no Idea what you mean about the 8 or 9 pins you are referring to. If you mean the fuel adjustment increments, I do believe I listed the ones that had adjustements.

And you are not mistaking, because I did say in a previous post that it was installed and working fine. This problem occurred all of a sudden. I don't know weather someone was fidgetting with my VAFC or what. It's not hard because I removed the ac controls and relocated them to the glove box and put the VAFC in the spot where the buttons were. But I will try those throttle settings.

Let me get this str8. I should set Lo throttle %5-10, so should I set hi throttle to %20-up?

Or better yet let me know if you can tune it yourself personally and how much you'd charge if your local to Washington DC metro area.

 

Did you try to zero everything out and see what happens from there? what were your dyno #'s

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sparknblaze &raquo;</TD></TR><TR><TD CLASS="quote">My fuel pressure is set to stock 33psi. I have no Idea what you mean about the 8 or 9 pins you are referring to. If you mean the fuel adjustment increments, I do believe I listed the ones that had adjustements.

And you are not mistaking, because I did say in a previous post that it was installed and working fine. This problem occurred all of a sudden. I don't know weather someone was fidgetting with my VAFC or what. It's not hard because I removed the ac controls and relocated them to the glove box and put the VAFC in the spot where the buttons were. But I will try those throttle settings.

Let me get this str8. I should set Lo throttle %5-10, so should I set hi throttle to %20-up?

Or better yet let me know if you can tune it yourself personally and how much you'd charge if your local to Washington DC metro area.</TD></TR></TABLE>

Hmm, it wierd that it happened all of a sudden, if nobody changed the VAFC settings and you didnt install anything new really the VAFC shouldnt be the culprit but umm lemme clear up some confusion about the settings i am suggesting, id love to tune it for you but im not in that area i do travel a bit now so if im scheduled to be in that area ill let you know. I was refering to fuel adjustment increments and you should have more "slots" available to choose at which revs you want the fuel to change at.

Lo Throttle 30%
Hi Throttle 31%

Ok so i answer some of my own questions you have 16 different RPM settings 8 each on the hi and lo cam side these are devided up into
(Narrow-Lo, Narrow-Hi, Wide-Lo, Wide-Hi)

basically WIDE-HI is all im going to worry about your not driving a race car, you can trim the other settings to -1/-3% if you want or leave @ 0. I'll give you WIDE-hi fuel settings later i have to run now.