howdy,
im having problems,

installed the vafc, no cel and everything is wired up properly but when you hit vtec, there is no vtec, the vafc shows that there is vtec but its definatley not engaging, i was reading the manual further and it says you have to set a correction for the vtec, so i if i were to set the engagement at 6k, and the stock engagements was 5200 then i would need to put in the number 8, well anyhow im not sure how to set the correction and im not 100% that it is even correct.


also what is the vtec engagement point for a pr3 ecu, i did a search and got 4800 and 5300

 

help me find my vtec

 

wtf

 

try checkin your wiring again. Was vtec workin before you installed the vafc

 

yes, and when i switched the vtec wire back to stock, it worked, the vtec input and vtec output come on, there is just no vtec, so its getting signal and sending signal, the only thin i can think is that the vtm wire shouldnt be hooked up.

 

so i just unhooked the pink, purple, and blue wire

hooked up my vtec wire like stock, and hooked the oil pressure switch back like stock, and my vtec works fine, but if i hook the pink and purple and blue back up, no vtec. i know that the pink and purple arent switched, because i tried to switch them. this really sucks.

 

i am going threw the same exact BS as you... the vtec turns on at the vafc but i can not here or feel it at all

Anyone want to help us out...

 

For the VTEC problem. Check under the main menu then select the ect. mode. Then select #4 sensor chk. Is there any voltage next to Pres (pressure)? VTi is when your ECU in its original form tells the VAFC to engauge VTEC. VTo is what you have it changed to (your reprogrammed X-over). When VTo is on your in VTEC if its hooked up right.

 

Got it figured out yet? yea, nay

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Phat_Optimo &raquo;</TD></TR><TR><TD CLASS="quote">Got it figured out yet? yea, nay</TD></TR></TABLE>

no not me i did go into the sensor ckeck when the car was on and all three things were fluctuating... is it hooked up right? but i still cant here or feel vtec... my ecu does have a mugen program could that be freaking things out

 

Select Monitor then select 1 VTo and 2 rpm. Watch the RPMs while they climb when on the throttle. When VTo says on you will be in VTEC. Watever RPM it turns on is where your X-over is. HTH

 

yes i did that and the x over says its at ~4300 or so... maybe i am setting it wrong. when i want to set vtec engagment i have to make L To H at a higher rpm than the H to L am i correct? is there a certain distance in rpms that they are supposed to be apart from each other?

 

Yes, the L--&gt;H: is where you want the cross over form low cam lobes to the high lobe. The H--&gt;L is where the high lobe switches to the low lobe when you let off the throttle. The L--&gt;H must be a higher rpm than H--&gt;L. I keep them 100 rpm apart. My L--&gt;H is @ 5100 and H--&gt;L is 5000.

 

do i have to change the cor % for it to opporate properly?

 

back to the top,

still havent found a solution yet

 

i hooked mine up and every thing worked fine vtec at 4800 off at 4400 and my correction is at like 1% L&gt;H. i also used the old wiring diagram not the updated one. ?????? also make sure all your sensor settings are correct.

 

you dont happen to have that old wiring diagram do u??

 

its on the apexi's site http://www.apexi-usa.com/documentation.asp then scroll down to the v-afc manual thats the one i used because the guy i got mine from didnt have the manual. the only difference between the udated and the old is the vtm signal wire

 

The manual has a mistake in it. I believe the pressure wires are backwards in the manual. Yellow and white wires are suposed to be reversed. White is pressure signal output and yellow is pressure signal input. POS manual.

 

are you positive?

is this gonna make my vtec work?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">are you positive?

is this gonna make my vtec work?</TD></TR></TABLE>
Did you check for voltage under sensor chk. If there is no voltage for pressure than this is your problem. I am 4 sure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Phat_Optimo &raquo;</TD></TR><TR><TD CLASS="quote">The manual has a mistake in it. I believe the pressure wires are backwards in the manual.</TD></TR></TABLE>

Really that is wierd i wander why apex-i did not anounce this at all...

did you install yours according to apex or the way you recomended

 

The manual is backwards. Just look at it closely how its printed. I have a pic of the manual that i have arrows pointing to the problem area. If you look closely you will notice the oreder of input and out put are off. 1st it shows VTEC solenoid signal. *NOTICE* Input signal is listed first then output is below it. Next look at the pressure signal. *NOTICE* Output is listed first but it should be input. Apexi has a printing screw-up here. #2 is printed wrong. I have mine rigged with white being the output and yellow is input. It works properly that way. Let me know what happens. Someone should send this pic to APEX-i. It would help lots of people.

 

i switched the wires and it still seems not to be engaging correctly...

how do i set the vtec correction

 

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