Not used to the single cam side of vtec I recently purchased my 92 cx with a d15b down inside it. It pulls great right now. rips through 2nd and the occassional 3rd gear chirp. I now find out that the vtec is not hooked up properly. Does anyone have a wiring diagram for the solenoid to the ecu? I am running a stock p28. thanks

 

ttt

 

how do you know vtec isnt working? you cant really feel it too much on a single cam. but anywase here https://honda-tech.com/zerothread?id=635580 about half way down how to wire vtec.

 

i disconnected both plugs on the solenoid and I felt no change in power band, no change in sound (i know, its a single cam, so the sound change wont be as significant as say a b16b which i've had before), no change in powerband, stops pulling at the top of 4th gear. And I contacted the seller and he told me "he thought" when he had to buy a new solenoid that he may or may not have hooked it up correctly. Thats where I draw my conclusion. THANKS FOR THE LINK btw!

 

do you have a check engine light???? and i can definately hear my vtec open up on my single cam... that shiet is loud

 

Yeah, the "idiot light" is on. I honestly don't even pay attention to them as with every swap I've ever had (6 to count) the check engine light has always been on for various reasons (most simple but not worth my time). where are you going with this?

 

its because the P28 ECU looks for the oil pressure switch and the JDM p08 ecu for the JDM D15b doesnt...therefore the JDM D15b does not have an oil pressure switch

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brockscivic &raquo;</TD></TR><TR><TD CLASS="quote">its because the P28 ECU looks for the oil pressure switch and the JDM p08 ecu for the JDM D15b doesnt...therefore the JDM D15b does not have an oil pressure switch</TD></TR></TABLE>

DING DING DING... we have a winnah!!! thanks for the info, learn something new evra day

 

vtec was wired up half wrong, so i had to completely rewire one (wire was toasted as well)





Modified by King Drifter at 11:55 AM 9/24/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brockscivic &raquo;</TD></TR><TR><TD CLASS="quote">its because the P28 ECU looks for the oil pressure switch and the JDM p08 ecu for the JDM D15b doesnt...therefore the JDM D15b does not have an oil pressure switch</TD></TR></TABLE>

This is exactly what I'm thinking.

 

Check your oil ***, p.m. me some pictures of the new ride y0!

 

hmmm if hes gettin a check engine light for the ecu not detecting oil pressure switch hes vtec is not engauging for sure a p28 will go into "SAFE MODE" if it doesn't detect the oil pressure switch for the vtec so i really have no clue how you feeling the vtec now

 

Slammed92hbonN20: pm sent

 

pm replied bro

 

You should be able to hear the vtec crossover on a jdm d15b. My buddy has the same setup and when using either the p08 or p28 it screams like a b-series.

 

i have the same motor in my 93 cx...vtec screamin at 5200 rpm's. but with my exhaust leak.... i lose a lot of power.

 

trying to see if someone is willing to trade their p08 for my p28

 

hey man, i have a p08, just got it..i need the p28...trade welcome!!!!!! located in london, give my cell a call.
519 902 1553

thanks
travis

 

what about me who has a d16a down in my civic and running on a stock p08? should be getn vtec? because im not getn any...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brockscivic &raquo;</TD></TR><TR><TD CLASS="quote">its because the P28 ECU looks for the oil pressure switch and the JDM p08 ecu for the JDM D15b doesnt...therefore the JDM D15b does not have an oil pressure switch</TD></TR></TABLE>

Theres just one problem with that. Its completely wrong. All OBD1 Vtec engines (JDM, USDM, or otherwise) have a Vtec pressure switch on the vtec solenoid and an ECU that looks for the pressure switch. All OBD2 JDM B-series engines do not have a Vtec pressure switch, and the corresponding ECU obviously doesn't look for one. All USDM B-series engines have the Vtec pressure switch and an ECU that looks for it.

If Vtec doesn't function there is either:
- A wiring problem
- Bad Vtec solenoid
- Bad ECU
- CEL that prevents vtec from working
- Not enough oil pressure, sometimes caused by a dented oil pan restricting the flow of oil to the pump.

Yes I realize this is an ancient thread, but I would like it to have correct info in it in case someone is trying to use it to solve their problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GRANT! &raquo;</TD></TR><TR><TD CLASS="quote">Yeah, the "idiot light" is on. I honestly don't even pay attention to them as with every swap I've ever had (6 to count) the check engine light has always been on for various reasons (most simple but not worth my time). where are you going with this?</TD></TR></TABLE>
Wow, you fail..It's not worth your time to have a properly functioning setup? Krak taht Vtak yo!

 

sorry this might be off topic but I see that you run a p28 on a d15b but what ecu would you have to run if you had a d15b block and vtec-e (vx) head?

 

no help?

 

dont forget to wire up a "vtec " light somewhere on the dash. i use a clifford l.e.d flush mounted in my cluster.

 

Any body have a write up on how to wire up a vtec light?!?! PM ME ASAP!