itr in vx
10-01-2003, 01:28 PM
#1
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itr in vx
Installing a USDM ITR in a 94 VX hatch using a kenji p28. Different people have told me different things but will i need to change my 5 wire o2 to a 4 wire and how Need some input installing this weekend. Thanks in advance!
10-01-2003, 01:35 PM
#2
Senior Member
Re: itr in vx (clayj)
Using the US B18C5 engine harness, your swap will be 99% PLUG AND PLAY
With that 1 %, you need to move ONE wire from the unused 4th plug on the VX shock tower harness. That one wire is the ORG/BLU wire. You need to move that to the biggest plug on the shock tower harness to match with the WHITE wire on the US ITR engine harness which leads from the O2 input (D14 pinout) to the O2 sensor.
Bolt everything else and yer done.
With that 1 %, you need to move ONE wire from the unused 4th plug on the VX shock tower harness. That one wire is the ORG/BLU wire. You need to move that to the biggest plug on the shock tower harness to match with the WHITE wire on the US ITR engine harness which leads from the O2 input (D14 pinout) to the O2 sensor.
Bolt everything else and yer done.
10-01-2003, 02:52 PM
#6
Senior Member
Re: itr in vx (clayj)
I would just to be safe. But it's not 100% required. Being 24,000 miles, you probably have nothing to worry about. But I would definitely inspect everything.
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10-01-2003, 06:17 PM
#9
Re: itr in vx (poison)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by poison »</TD></TR><TR><TD CLASS="quote">Using the US B18C5 engine harness, your swap will be 99% PLUG AND PLAY
With that 1 %, you need to move ONE wire from the unused 4th plug on the VX shock tower harness. That one wire is the ORG/BLU wire. You need to move that to the biggest plug on the shock tower harness to match with the WHITE wire on the US ITR engine harness which leads from the O2 input (D14 pinout) to the O2 sensor.
Bolt everything else and yer done. </TD></TR></TABLE>
That's the easy way if you are using the ITR harness or any harness that supports the 4 wire O2 wiring. If you are forced you use your stock VX harness then the wiring is a little more complicated. If you are going that route hit me up and I'll send you a good write up that I did on how it's done.
With that 1 %, you need to move ONE wire from the unused 4th plug on the VX shock tower harness. That one wire is the ORG/BLU wire. You need to move that to the biggest plug on the shock tower harness to match with the WHITE wire on the US ITR engine harness which leads from the O2 input (D14 pinout) to the O2 sensor.
Bolt everything else and yer done.
</TD></TR></TABLE>That's the easy way if you are using the ITR harness or any harness that supports the 4 wire O2 wiring. If you are forced you use your stock VX harness then the wiring is a little more complicated. If you are going that route hit me up and I'll send you a good write up that I did on how it's done.
10-02-2003, 10:17 AM
#11
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Re: (clayj)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clayj »</TD></TR><TR><TD CLASS="quote">im using the itr motor harness and my vx car harness</TD></TR></TABLE>
Yep, then the four wire O2 is already embedded in the ITR harness, you just need to move that one wire.
Yep, then the four wire O2 is already embedded in the ITR harness, you just need to move that one wire.
10-02-2003, 08:45 PM
#12
Re: itr in vx (poison)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by poison »</TD></TR><TR><TD CLASS="quote">I would change the timing belt and water pump. </TD></TR></TABLE>
i agree....since you already have the motor out the car
i agree....since you already have the motor out the car
10-03-2003, 08:48 PM
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Re: itr in vx (Nerv2g)
I have one more quick question. I have been running my car for a month now without changing any wires and I have a 92vx with an itr motor. I do not have an O2 sensor cell. This is the first I have heard of this wiring. Can anyone tell me how my car is running then? Can anyone please post pics of the wiring? Thank you
10-04-2003, 07:04 AM
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Re: itr in vx (Nerv2g)
No one knows now? I know plenty of people who have done itr's swap's in there vx's and b16 swap in vx's which both have 4 wire O2 sensor and have never done this wiring mod that you guys are talking about. Even Tom the MOD on the EG+/del sol board wrote a how-to article and he never mentioned this. Sounds fishy 
10-05-2003, 01:57 AM
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Re: itr in vx (Nerv2g)
Nobody? I think the wires you are talking about is if you continue to try and run the EGR system. CLAYJ: Do listen man just continue your swap everything is 100% plug and play. The EGR system is not needed it is a little canister onthe firewall I threw mine out after my swap. Hope that helps
10-06-2003, 08:52 PM
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Re: itr in vx (Nerv2g)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nerv2g »</TD></TR><TR><TD CLASS="quote">Nobody? I think the wires you are talking about is if you continue to try and run the EGR system. CLAYJ: Do listen man just continue your swap everything is 100% plug and play. The EGR system is not needed it is a little canister onthe firewall I threw mine out after my swap. Hope that helps </TD></TR></TABLE>
I just fixed this on my swap. No CEL but datalog was showing me that the o2 sensor was NOT reading. Once I took the orn/blue wire and repinned it to match up with the large wht wire on the obdII harness, it reads now.
You may seem to be fully operational, but i'm betting your o2 is not reading.
</TD></TR></TABLE>I just fixed this on my swap. No CEL but datalog was showing me that the o2 sensor was NOT reading. Once I took the orn/blue wire and repinned it to match up with the large wht wire on the obdII harness, it reads now.
You may seem to be fully operational, but i'm betting your o2 is not reading.
10-07-2003, 04:14 AM
#19
Former Moderator
Re: itr in vx (splitime)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by splitime »</TD></TR><TR><TD CLASS="quote">
I just fixed this on my swap. No CEL but datalog was showing me that the o2 sensor was NOT reading. Once I took the orn/blue wire and repinned it to match up with the large wht wire on the obdII harness, it reads now.
You may seem to be fully operational, but i'm betting your o2 is not reading.</TD></TR></TABLE>
Never heard of this before, but if you say that's the deal then I believe you.
I've never thrown a CEL with my 1992 CX and I added no wires, repinned nothing, and I run a Kenji P28 with the ITR engine harness.
I know it's running right though because my a/f ratios are fine and I made 176/130 on the dyno after V-AFC and FPR tuning.
So you guys are saying that this is a VX-only thing, or what? Is it because the VX uses a 5-wire o2 sensor, or what?
I've heard a couple of times that one or two wires didn't look to match up, but again I've never moved a single wire on my swap and it runs 100% perfect and has for 3 years. It was in my old 1992 Si for a year or so before I transferred it into my 1992 CX.
Anyways other than that (it seems) the swap will be 100% plug and play if you run the ITR engine narness and Kenji P28 ECU. Don't listen when people tell you "you can't run an OBD2 engine harness in an OBD1 car" because it's bullshit and you'll be giving up the better/newer distributor, injectors, and starter that way.
I just fixed this on my swap. No CEL but datalog was showing me that the o2 sensor was NOT reading. Once I took the orn/blue wire and repinned it to match up with the large wht wire on the obdII harness, it reads now.
You may seem to be fully operational, but i'm betting your o2 is not reading.</TD></TR></TABLE>
Never heard of this before, but if you say that's the deal then I believe you.
I've never thrown a CEL with my 1992 CX and I added no wires, repinned nothing, and I run a Kenji P28 with the ITR engine harness.
I know it's running right though because my a/f ratios are fine and I made 176/130 on the dyno after V-AFC and FPR tuning.
So you guys are saying that this is a VX-only thing, or what? Is it because the VX uses a 5-wire o2 sensor, or what?
I've heard a couple of times that one or two wires didn't look to match up, but again I've never moved a single wire on my swap and it runs 100% perfect and has for 3 years. It was in my old 1992 Si for a year or so before I transferred it into my 1992 CX.
Anyways other than that (it seems) the swap will be 100% plug and play if you run the ITR engine narness and Kenji P28 ECU. Don't listen when people tell you "you can't run an OBD2 engine harness in an OBD1 car" because it's bullshit and you'll be giving up the better/newer distributor, injectors, and starter that way.
10-07-2003, 04:19 AM
#20
Re: itr in vx (B18C5-EH2)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 »</TD></TR><TR><TD CLASS="quote">So you guys are saying that this is a VX-only thing, or what? Is it because the VX uses a 5-wire o2 sensor, or what?</TD></TR></TABLE>
Yes it's only a problem in the VX model. Basically the VX has a factory wideband O2 unlike the CX which is a single wire O2 like what's used in the older OBD0 setups. The VX has an extra cabin harness plug on the passenger side which is where the O2 wiring lies. When you do a swap in a VX and use a different engine harness (one that supports the 4 wire O2) other than the stock harness, that's when you need to repin the wire so it makes the proper connection.
Yes it's only a problem in the VX model. Basically the VX has a factory wideband O2 unlike the CX which is a single wire O2 like what's used in the older OBD0 setups. The VX has an extra cabin harness plug on the passenger side which is where the O2 wiring lies. When you do a swap in a VX and use a different engine harness (one that supports the 4 wire O2) other than the stock harness, that's when you need to repin the wire so it makes the proper connection.
10-07-2003, 04:22 AM
#21
Former Moderator
Re: itr in vx (VTECVillain)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECVillain »</TD></TR><TR><TD CLASS="quote">
Yes it's only a problem in the VX model. Basically the VX has a factory wideband O2 unlike the CX which is a single wire O2 like what's used in the older OBD0 setups. The VX has an extra cabin harness plug on the passenger side which is where the O2 wiring lies. When you do a swap in a VX and use a different engine harness (one that supports the 4 wire O2) other than the stock harness, that's when you need to repin the wire so it makes the proper connection.</TD></TR></TABLE>
Excellent.
I remember a guy asking me months ago what that "extra" plug on the Vx was, and I had no idea. I told him I wasn't sure, so now this makes perfect sense.
I guess I'll be revising some posts with wiring info, huh?
Yes it's only a problem in the VX model. Basically the VX has a factory wideband O2 unlike the CX which is a single wire O2 like what's used in the older OBD0 setups. The VX has an extra cabin harness plug on the passenger side which is where the O2 wiring lies. When you do a swap in a VX and use a different engine harness (one that supports the 4 wire O2) other than the stock harness, that's when you need to repin the wire so it makes the proper connection.</TD></TR></TABLE>
Excellent.
I remember a guy asking me months ago what that "extra" plug on the Vx was, and I had no idea. I told him I wasn't sure, so now this makes perfect sense.
I guess I'll be revising some posts with wiring info, huh?
10-07-2003, 08:05 AM
#22
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Re: itr in vx (B18C5-EH2)
Also, with the VX you could run the Kenji without any issues. Its a open loop (or closed i forget ) but it doesnt even read the o2 sensor. So it'll run the same, o2 or not.
) but it doesnt even read the o2 sensor. So it'll run the same, o2 or not.
10-07-2003, 10:12 AM
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Re: itr in vx (splitime)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by splitime »</TD></TR><TR><TD CLASS="quote">Also, with the VX you could run the Kenji without any issues. Its a open loop (or closed i forget ) but it doesnt even read the o2 sensor. So it'll run the same, o2 or not.</TD></TR></TABLE>
Maybe that is why I do not have a probelm then. I am using a Kenji chipped P28 with my swap
) but it doesnt even read the o2 sensor. So it'll run the same, o2 or not.</TD></TR></TABLE>Maybe that is why I do not have a probelm then. I am using a Kenji chipped P28 with my swap