hwani.h22a.

I have VAFC2 that I wanna take off.

It wasn't tuned, just basic initial setup, low-hi setting changed to 5000k,
hi-low changed to 4700. throttle setting to 35, 50.

I was wondering, what would happen when I take it off.
Would original settings all come back and run as good as before,
or do I have to do something before?

 

DBR 02

Nope, you should be fine as long as you fix the wiring that you modified when it was installed.

...that is, assuming that you haven't done anything else to your car that would require the VAFC.

- Jesse

hwani.h22a.

what do you exactly mean fix it the wiring back?

sorry for questions.. I didn't install the VAFC so..

DBR 02

The way that the VAFC works is that it lies to the ECU and the engine. It takes the manifold pressure signal and the VTEC signal and modifies how it sends it, (Pressure signal), or when it sends it, (VTEC signal). You must splice the stock harness wire back together again to return to stock. All of the splicing should have been done at or near the ECU.

- Jesse

Aznluder

i just installed mine, is it normal that vtec doesnt kicks in proprely ?? i think i lost some power here... i didn't touched the setting at all, anyone know how to tune it well ? ..im kinda newb to this..i need to know how it works

thanks

__________________

HaPpYfAcE

if you go to the apexi website, you can download the manuals, and it tells you how to adjust the settings...you can add or remove fuel by adjusting the pressure settings that the vafc communicates to the ecu. you can also adjust the vtec crossover point. if you do a search, you should find some good info on what kinda settings others have used.

btw..hwani.h22a if you are going to get rid of the VAFC2, let me know...

__________________
XBL -h4ppyface - add me, bish!
STEAM -h4ppyfac3, happyfac3
User Id: 24334 Name: gfrfAcE

Kool-Lude

VAFC (version I) has a default vtec setting much higher than stock..I think its 6400..so unless you lower it to at least the factory engagement point, you will indeed lose power.

__________________

mdpc20653

read the manual. it tells you step by step what to do prior to even turning the unit on. i got it from www.apexi.com it's pretty detailed. from sensors to cylinders. and vtec comtrol.

__________________
If toy prelude models were being sold, I would buy like 12 and have toy prelude meets on my desk. I would also buy a civic for all the toy preludes to laugh at

MarylanD Prelude Club - R.I.P. gone but not forgotten

hwani.h22a.

what if I just disconnect the VAFC from ecu connectors?

CEL probably be on for not registering ECU? what else?

HaPpYfAcE

the vafc splices into certain wires... two to be exact. the air pressure signal and the vtec solenoid signal. if you disconnect it, you will have a CEL, no vtec, and very crappy gas mileage, if the car really runs great at all.

you will have to rewire the ecu to read those signals directly rather than sending them thru the vafc. the other wires, the vafc just reads off of so those are not such a big deal....they're not spliced...just tapped in.

diagram....
SPLICED
pressure signal-------VAFC-------ECU
vtec solenoid signal-------VAFC-------ECU

TAPPED

..............................VAFC
throttle signal --------^--------ECU


hahaha....dunno if that makes sense or not. lol. hit me up on AIM...jrsbassplayr if you have more questions...i helped someone install theirs over the phone, so if you need help taking it off, shouldn't be a problem.

__________________
XBL -h4ppyface - add me, bish!
STEAM -h4ppyfac3, happyfac3
User Id: 24334 Name: gfrfAcE