Okay, I've read through most of the FAQ's I could find, but I still have a few questions.

My friend just bought a '92 VX with a d15 block, stock VX tranny and I'm assuming a VTEC head of some sort. I don't know what exactly it's from, but the head is stamped P2J-5 above the exhaust manifold and P06 HF-1 on the back of the intake manifold.

It seems that all is needed is the complete head, the distributor and the p28. I'm confused as to how all the vacuum systems get hooked back up.

Anyway, the car is throwing all kinds of codes and there seems to be useless wiring strewn about that doesn't seem to be of any real use. Questions:

1. Does the o2 sensor need to be rewired? It's currently a 5 wire sensor.

2. How do I determine if the distributor is the correct one or if it's the stock VX dizzy?

3. What do I do with the Map sensor? On the VX, it mounts on top of the TB, but there's nowhere on his IM to mount it and it's just dangling down behind it.

4. It's throwing codes 3, 7, 21, 22, and 41...I don't understand why it would be throwing the VTEC codes (21, and 22) if the car was a VX stock and already had the VTEC wiring run? It's got a p28 in it currently.


I may have more questions as I try to figure out what's going on. My biggest concern is that whoever did this novice looking install didn't pull the plug on the block for the VTEC to work....there seem to be a few people who have made that mistake from what I can tell.

TIA for any light you can shed on this topic for me.

 

I will try to answer what I can.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">O1. Does the o2 sensor need to be rewired? It's currently a 5 wire sensor. </TD></TR></TABLE>

Why you need to rewire it. It is throwing code 41. Check the shielded wire of the 02 and make sure it is wired correctly.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">2. How do I determine if the distributor is the correct one or if it's the stock VX dizzy</TD></TR></TABLE>

From what I have seen, all 92-95 civic dizzy are pretty much the same.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">3. What do I do with the Map sensor? On the VX, it mounts on top of the TB, but there's nowhere on his IM to mount it and it's just dangling down behind it.</TD></TR></TABLE>

Wtf, what TB is it running? It should mount on the TB.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">4. It's throwing codes 3, 7, 21, 22, and 41...I don't understand why it would be throwing the VTEC codes (21, and 22) if the car was a VX stock and already had the VTEC wiring run? It's got a p28 in it currently.</TD></TR></TABLE>

You are throwing 3 and 7, TPS and MAP have the same plug, check to see if they are switched around. It sounds like Vtec is not wired up at all. Recheck the wires. (understand that VX does have Vtec, but that is saying the swapper used the stock harness).

 

Well the wiring for the 02 sensor has been rewired...but they just wired it up exactly like stock! It's pretty much nothing more than an extension. Same with the VTEC solenoid...they, for whatever reason, added a few inches of wire that went to the exact same place. It took me a while to figure out what was going on.

So the dizzy shouldn't be a problem at all?

I have absolutely no clue whatsoever what head, intake manifold or TB the car has in it. Neither does the owner, he bought the car completely as-is and doesn't know the first thinga bout the swap. All I know is that there's no place to mount the Map sensor!

I'm almost 100% positive that the engine harness is the stock VX harness because there's a plug that isn't being used...it goes to the goldish colored valve right near the vtec solenoid on the back of the head. I don't know what it's called, but I know my VX has it.

 

Try do undo the **** they did. Where did they extend the wires for vtec and 02 (what part on the harness)? Check to see if the power it going to the ECU thought the Vtec and 02. 41 is a heated signal from the 02, check the shielded wire, they may have fucked it up.

 

Well from the vtec solenoid they have orange wire soldered in that extends for about an inch, and then goes right back into the exact wire! It's a completely useless extension from what I can see.

As far as the 02 sensor, they have about 3" of stock wire from the harness plug and have crimp connections that attach to the same type of orange wire. All 5 wires are done in orange, all with crimp connectors....after the crimps, the orange wires wraps all the way around the engine, hangs down under the IM and then goes into the o2 sensor. It's still the 5 wire o2 sensor, and they just put like 2 feet worth of crappy extensions to make the o2 wiring to reach onto the downpipe instead of the exhaust manifold like it does stock.

Does the p28 operate a 4 wire or the 5 wire o2 sensors? Right now it's still the 5 wire... Does it need to be swapped out?

I'll try to get pics of this up ASAP..it's really a sight to behold. lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">
Does the p28 operate a 4 wire or the 5 wire o2 sensors? Right now it's still the 5 wire... Does it need to be swapped out?</TD></TR></TABLE>

Wow, I totally forgot that. VX and Hx run on 5 wire 02, the others are 4 wire and then your CXs that have one wire. That probably is your problem, but I have not personal dealt with a 5-wire running a 4-wire ECU. You will have to preform the VX 02 trick to run a four wire 02 in a vx (can be found in poison's h22a thread in hybrid).

Try to connect the original vtec wires together and see what happens. This car sounds ghetto swapped, so try to redo all the **** that the original swapper did.

 

well that's good to know...do you think that'll get rid of code 41?

Also....you *may know* what this thing is. Connected inline between the IM and the brake booster is this long black cylindrical shaped thingy with a gauge on it (don't have any idea what the measurements are.) It's about 3" in diameter, and probably 8" long. It is made by Rays.

It's mounted to the firewall in place of the black box that I have in my VX. The previous owner told my friend that it's a brake booster...which I don't really get. He said the brakes are VERY touchy....maybe it's an EXTRA booster of some sort?

Anyway, because of that...there's an extra harness that has nothing to plug into. It's whatever goes inside the black box that's on the firewall right behind the IM.

Very weird indeed....I hope I don't have to hunt down a bunch of crap.

Thanks for all the help dude....I really appreciate it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">well that's good to know...do you think that'll get rid of code 41?</TD></TR></TABLE>

Most likely. Wire it right and it will most likely fix it.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">Also....you *may know* what this thing is. Connected inline between the IM and the brake booster is this long black cylindrical shaped thingy with a gauge on it (don't have any idea what the measurements are.) It's about 3" in diameter, and probably 8" long. It is made by Rays.

It's mounted to the firewall in place of the black box that I have in my VX. The previous owner told my friend that it's a brake booster...which I don't really get. He said the brakes are VERY touchy....maybe it's an EXTRA booster of some sort?

Anyway, because of that...there's an extra harness that has nothing to plug into. It's whatever goes inside the black box that's on the firewall right behind the IM.</TD></TR></TABLE>

wtf, picture is worth a thousand words.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">Very weird indeed....I hope I don't have to hunt down a bunch of crap.

Thanks for all the help dude....I really appreciate it. </TD></TR></TABLE>

I see it all the time at my shop. The bad part is, most of the time, you have to sit with a multimeter, test light and wiring diagram(s) to figure out what they messed up. Check in the switched TPS and MAP sensor plugs and try to see if extensions of the harness are cause the problems (besides 02).

I wish you luck, IT should be that hard now