Well I've had a V-AFC new in the box for almost 3 years now and I've yet to install it for a few reasons:

1. Most of the guys I know have had mysterious CELs and nothing but problems since the install. the wiring was done correctly and all, but for some reason both cars in question had a mysterious 5th gear CEL. Anyone know about this?

2. I've never gotten the CORRECT wiring diagrams.

Now I'm going to the dyno tomorrow and I'm curious as to whether or not I should put the V-AFC in.

My B18C5 dynoed 175whp with the only mods being AEm CAI for 99 Si, Tanabe RD exhaust for the 1992-1995 Civic (it's in a hatch), a Kenji-spec P28 (OBD1), and untuned Skunk2 cam gears set at +2, -1 on a hunch.

My midrange was hella weak and the dyno guy told me that 15whp could be tapped into with a V-AFC and a wideband 02 sensor tuning.

I've since added a Dc JDM 4-1 header and 2.5'' Carsound cat and I'm going to the dyno for a "before" reading and then an "after" reading after the installation of a prototype STREETABLE electric waterpump.

So what do you guys think?

Who here has had no proiblems with their V-AFCs in their ITRs?

Who here can hook me up with the current, correct wiring diagrams?

Thanks in advance!

P.S:

I'll be sure to document the entire electric waterpump deal too. I have a friend who had the Mezier (sp?) one on his Type R and it never got warm enough to run well or have the heater working. i've been assured that the one going on my B18C5 will fix those problems and even be adjustable via an electronic control box.

 

I have had no problems with my vafc. check the apexi web site for the wiring diagrams. there is an update.

 

Thanks a lot.

Do you happen to have the link?

 

try here for diagram
http://www.apexi-usa.com/documentation.asp

i think it would be worth it for you to install it and get it tuned.

 

Okay thanks for the link - I searched Google and got this:

http://www.apexi-usa.com/documentation.asp

...and I'm printing up the diagram via Acrobat Reader.

I need to know which colors of the V-AFC wries are for what though. I'm looking at the followring:

VTEC signal

RPM

Signal Power

Ground

VTM Signal

Throttle Signal

Pressure Signal

So does anyone here know which wires are which color?

Thanks so much guys - I'm trying to get this installed before 2:00pm tomorrow.

 

I am glad I had mine at my last dyno visit! Helped with my a/f some and also let me lower Vtec to 5200!

BTW.. Hook up the VTM wire! Dont listen to those people, Just go by the Wiring diagram Supplied! You will be fine!

Eric

 

put the bitch in and go to dyno!

 

If I don't get these wire colors sorted out then I won't be tuning shiot!



With a baseline untuned at 175whp before the header and cat, I was hoping for 180-185whp after the header, cat, and tuning. More imposrtantly I'd like to get the midrange fattened up.

 

U got IM.....

 

Okay I found the wire colors on page 12 of the original driections thanks to an EG forum guy, but I have a few more Q's real quick:

1. Are these colors correct?

Red = IG power

Orange = IG power

Black = Ground

Brown = Ground

Green = RPM Signal

Gray = Throttle Signal

Blue = VTM

Purple = VTEC Solenoid Signal Output

Pink = VTEC Solenoid Signal Output

Yellow = Pressure Signal Output

White = Pressure Signal Output

So are these still correct? I thought I've heard that some of the wires were crossed on the original directions, but only the originals have this color diagrams.

Can anyone varify the correctness/incorrectness of this color code chart?

Thanks so much in advance!

 

don't have my stuff in front of me but it sounds right.....anyone have their Apexi book.

 

I have my original manual right here. Been thru hell and back.

You have them all right exepct for:

Purple = VTEC Solenoid Signal Output

White = Pressure Signal Output

They Should be INPUT, not output.

 

Okay I'm sorry if I'm beating a dead horse, but is that a newer, updated book?

Weren't the older, more original books wrong on two wires?

Thanks again for bearing with my retardedness.

 

Okay here's what I've found, so PLEASE correct what might be wrong:

Also, with my B18C5 being OBD1 at the ECU plug (running re-chipped P28) would I not use diagram number WH-1 here?





So let me go over your replies and see what needs to be changed.

 

Just Do as it says, I followed directions and In less then an Hour i had mine Working!!

Eric

 

The best thing to do is to count the pins/sockets, can't remeber who told me but I got mine working in about 1.5 hours minus the Vtec (No VTM wire at the moment). If you count the pins it's easier because the wires are a real mess and theres a lot of them and maybe Honda/Aura might have used different colored wires in different cars and that'll really confuse things.

 

Also another thing:

What's the deal with the VTM wire? I am for sure hooking it up, but I've read elsewhere that there's something confusing about it, like there's not even a wire to tap into on the OBD1 ECU harness.

Remember, my B18C5 is all OBD1. I used the ITR engine harness and it totally plugged right into my Civic's chassis harness and then I used a Kenji-Spec P28 re-chipped so again it's all OBD1.

Looking at those diagrams does everything look correct?

I'm going into work at 7:30AM before the shop opens up for my boss and I to begin the wiring.

I will be so pissed if I don't have VTEC working once I head to the dyno at 9:30AM!

 

V-AFC is well, worth it, Tom. I got really nice gains dyno-tuning w/ wideband )2 on mine.

I have to re-do it all once I hook up my Kenji-spec OBD1 setup, though. OBD@ couldn't cope w/ aggressive V-AFC and camgear tuning. I'll probably just lean out the low-throttle settings to save some gas while cruising. Hopefully Kenji's magic will produce some power.

Good luck, looking forward to seeing the results. I'll find mine out in early March.

 

Put that sucker in

 

wh-1 is correct. b18c5 with obd1.

do not go by the wiring colors as i have seen people screw up because of that.
this may explain cels, in addition to loose wiring, etc.

after a while all the colors look the same.

with the VTM wire thing: some people with obd 1 decide not to wire it as the older apexi documentation does not have this wire mapped. however now they have done everything right again and it is mapped on wh1.

Did not wiring it cause problems? not according to their replies, but I would think its important.

imho, i'd suggest going with a hondata for any thing but just mild tuning from a mild set up.



[Modified by Soup ****, 12:10 AM 2/18/2003]

 

.....don't you work at a shop?