Okay, I finally paperclipped my CEL on my DX hatch with JDM D15B VTEC, and it turns out it's these:

-O2 sensor (That's normal, I need a new one of those)
-VTEC solenoid
-VTEC pressure switch?

This is all on the P08 that the engine came with, which is meant to run with that engine. Now, correct me if I'm wrong, but JDM D15B's don't have VTEC pressure switches right? So, why do you think it's throwing a pressure switch code if there isn't, and has never been one? Anyhow, I've done some searching, and found a little bit on wiring for VTEC, but can anybody help me with these problems, excluding the O2 sensor CEL? Thanks for anyone who has some helpful information, or even some links I could use.

EDIT: I am willing to admit that this could be a stupid mistake that yields an easy fix, but if I could get some real details, that'd be very helpful. In the meantime, while waiting for any possible advice from you guys, I'll continue searching around the threads.


Modified by BlackoutVTi at 11:26 AM 7/28/2007

 

BUMP^

 

Come on guys, there's gotta be someone out there with some input on VTEC problems on a Honda automotive website. I appreciate any helpful input you may have, just to get things going.

I've been searching, not much is coming up for my specific problems.

Bump

 

VTEC Solenoid and VTEC pressure switch are the same thing. You just have two of them if it's the D15B Three-Stage.

 

The three stage VTEC engine would include two solenoids, which would be evident in the engine bay, right?


But, about you saying that they are the same thing on the JDM engines, this problem could be solved if I just try to properly reconnect the solenoid?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlackoutVTi &raquo;</TD></TR><TR><TD CLASS="quote">The three stage VTEC engine would include two solenoids, which would be evident in the engine bay, right?


But, about you saying that they are the same thing on the JDM engines, this problem could be solved if I just try to properly reconnect the solenoid?</TD></TR></TABLE>

Yes, it's evident. They're right behind the distributer.

 

Alright, well if they're apparent, then it's definitely not the 3 stage engine. I've looked through some "how to wire VTEC" threads, but if you have some serious step-by-step, detailed instructions, I'd be happy to receive them. Thanks for getting this going by the way.

 

Well, if you've got the P08 and a D15B that has no VTEC pressure switches (solenoids), then of course you're going to throw codes . . . you have no VTEC.

Not all JDM D15B's are the three-stage VTEC. Some are just the equivalent of our D15B8's and D15B7's. Some are even just D15B's with single stage VTEC (basically a 1.5L version of the D16Z6).

This is what a solenoid looks like:

 

Okay, what I'm concerned about is that the green plug below the vtec solenoid, which I've read is the plug for the VTEC pressure switch, is not present on my engine. So, if there isn't one, then what are the specifics in wiring the VTEC solenoid to eliminate these CEL codes? Asside from the o2 sensor code of course

 

Update:

Problems have been solved. Turns out my bud wired the VTEC solenoid to the wrong damn pin in the ECU. We fixed that up, and set it to A4. Then all of a sudden, the o2 code went away. That's okay, since I'm going to replace the thing soon anyhow, and that's really not the problem. So, that only left the code 22 pressure switch. Well, I did some old fashioned searching and came upon a write-up to bypass the pressure switch, which was meant for those swapping a JDM D15B and having difficulties. That did the trick. She idles like a dream now that the o2 is functioning, and the VTEC is operating like it should, so problem solved for now. Thanks Eran for the input!

 

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

Problems have been solved. Turns out my bud wired the VTEC solenoid to the wrong damn pin in the ECU. We fixed that up, and set it to A4. Then all of a sudden, the o2 code went away. That's okay, since I'm going to replace the thing soon anyhow, and that's really not the problem. So, that only left the code 22 pressure switch. Well, I did some old fashioned searching and came upon a write-up to bypass the pressure switch, which was meant for those swapping a JDM D15B and having difficulties. That did the trick. She idles like a dream now that the o2 is functioning, and the VTEC is operating like it should, so problem solved for now. Thanks Eran for the input! </TD></TR></TABLE>

Glad you got it figured out

 

is bypassing the VTEC pressure switch a temporary fix? and you mentioned it was for the jdm d15b swappers, why?

I have a 92 VX with the oem d15z1 - and I've been intermittently getting the code 22 (VTEC pressure switch).

sorry to jack, but since you figured your issue out, maybe you can give me some insight. I'll search once the search function starts working again - not working at the moment..

thx

 

Hey there. Well, apparently I read that the bypassing technique is for those who have, say, a p28 ECU for their D15B engine(Which looks for a VTEC Pressure Switch signal), since many can't get the po8 that is meant for it. Well, with the confusion of it still acting up aside, I just decided that since the VTEC solenoid and pressure switch are the same thing, that I would use the bypass to just splice the signals to both ports. Since it fixed the problem, and the VTEC is operating properly (As far as I know, going to do some more tests with a VTEC light), then I consider this a permanent fix, aside from the o2 sensor just all of a sudden behaving.

However, if you have the OEM D15z1 that's not meant to even throw the code, maybe you should take it to a real mechanic (I am not one) and see what he would do to solve the problem. I don't know if the bypassing thing is a well-known and used technique amongst the mechanic garages. I didn't because I just wanted to do it myself, since apparently, my friends and I did something wrong when swapping the engine.

 

hey, thanks for the reply.

The D15Z1 is the VX VTEC-E engine..so I'd think it does have the VTEC solinoid/pressure switch..

I'll have to look into this more deeply once the search funtion is working again..yar.

 

hey,where i can find the specs for the d15b engine? that's the mini-me right? i'm new,and just like you i have a cheap old '89 civic dx hatch and i want to save the sohc too

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Heinz57 &raquo;</TD></TR><TR><TD CLASS="quote">hey, thanks for the reply.

The D15Z1 is the VX VTEC-E engine..so I'd think it does have the VTEC solinoid/pressure switch..

I'll have to look into this more deeply once the search funtion is working again..yar.

</TD></TR></TABLE>

If its the Vtec-e motor you actually have 2 solenoids. You have 3 stage vtec and you need the ECU to match.